Pricing for the 2011 Impreza WRX and WRX STI models, which will hit the US dealerships in September has been announced.
The 2011 Impreza WRX price starts at 25,495 USD for bot the four-door and five-door variants, while the 2011 Impreza WRX STI price starts at 33,995 USD.
2011 Subaru Impreza WRX comes with redesigned front and rear bumpers, wider front fender and outlets, new exhaust pipes and new chrome inserts and the two upgraded version based on this model are the Subaru Impreza WRX Premium and the Subaru Impreza WRX Limited for which pricing start at 27,995 and 28,995 respectively.
In these last mentioned versions the automaker adds the All Weather Package, fog lights, a power moonroof and a trunk lid spoiler on the sedan, plus 6 upgraded speakers and Blue connectivity.
The Subaru Impreza WRX STI features the 2.5-litre turbocharged and intercooled Boxer engine that is good for 305 HP and in this case some of the revised features include a retuned suspension, larger stabilizer bars (front and rear), stiffer coil springs and better steering.
As for the range topping version which is the Subaru Impreza WRX STI Limited, pricing starts at 37,345 USD and besides the leather interior the automaker adds BBS alloy wheels, a power moonrof and fog lights. 
Subaru press release :
Subaru of America, Inc. today announced pricing for the 2011 Subaru Impreza WRX and WRX STI models. Arriving in dealerships in September, the aggressively redesigned 2011 WRX starts at $25,495 for both the 4-door and 5-door models. The 2011 WRX STI 4-door is $1,000 less than the starting price of the 2010 5-door (non-Special Edition) STI at $33,995.
Subaru Impreza WRX 
Beginning at $25,495 – a modest $500 increase for the 4-door and the same starting price for the 5-door – the aggressive body style changes for WRX include new front & rear bumpers, wide front fenders and quarter panels, and a WRX logo side fender badge.  The sedan adds a rear chrome satin finish and quad tailpipe outlets.  The WRX receives new gunmetal gray alloy wheels
paired with wider summer-performance tires.  Additionally, all WRX models now have six upgraded speakers and come with steering wheel control switches for audio and Bluetooth functions. 
The Subaru Impreza WRX Premium starts at $27,995 (both 4- and 5-door) and adds the All-Weather Package, power moonroof, and fog lights.  The sedan also includes a standard rear trunk spoiler.  The Subaru Impreza WRX Limited is available from $28,995 (both 4- and 5-door) and features HID headlights and leather-trimmed upholstery. A GPS touch-screen Navigation system is available on Premium and Limited trim levels and includes a 7" touch-screen and standard Sirius satellite radio.
Subaru Impreza WRX STI
The Subaru performance leader, the WRX STI, returns as a 4-door sedan – along with the 5-door for the 2011MY.  The Subaru Impreza WRX STI 4-door starts at $1,000 less than the 2010 WRX STI 5-Door (non-Special Edition) at $33,995.  In addition to its wide-body style, the WRX STI sedan also brings back its signature impressive rear trunk spoiler. All WRX STI models include the All Weather Package.
The WRX STI is powered by a 2.5 liter, turbocharged and intercooled Subaru Boxer® engine pumping out 305 horsepower.  To further improve its performance, the 2011MY WRX STI has a retuned suspension that includes improved suspension bushings, larger front/rear stabilizer bars, and stiffer
front/rear coil springs that provide tighter handling, less body roll and improved steering feel.  All WRX STI models are available with optional GPS Touch-Screen Navigation with a 7" LCD touch-screen for $1,800. Additionally, all WRX and WRX STI models also receive a new mesh-type grill along with an
upgraded audio system that includes standard Bluetooth hands-free calling and audio streaming, iPod control capability, an auxiliary input jack, USB port, and XM/Sirius capability with a roof mounted antenna.
A new trim level, the Subaru Impreza WRX STI Limited 4-door, is added with a starting price of $37,345 and includes leather-trimmed upholstery, 18-inch BBS alloy wheels, power moonroof and fog lights. 
The Subaru Impreza WRX STI Limited 5-door starts at $35,995, and includes 18-inch BBS alloy wheels.
The Destination and Delivery charge for these and all 2011 Subaru models is $725 (Alaska D&D is $875).  Complete WRX and WRX STI model information and prices can be found at www.media.subaru.com.
Subaru of America continues to enjoy record sales after its best-ever sales year in 2009, with June sales up 35-percent year-to-date.

Source: Subaru