This is more difficult than it looks but having spent the day pondering (and assuming the rules are uk spec and manufacturers OTR price i think it would have to be this...
http://www.subaru.co.uk/Subaru_co_uk/ViewMenu.qed?menuid=M0M0M6Subaru Impreza WRXS
2.5 WRXS - Key features at a glance :
5 Speed manual
Driver, Front Passenger, Side and Curtain airbags
ABS with Electronic Brakeforce Distribution
Subaru Vehicle Dynamics Control
Remote Central Locking with Thatcham Category 1 Alarm and Immobiliser
HID Xenon headlamps with automatic levelling
Pop-up headlamp washers
Rear privacy glass
Cruise control with steering wheel control
Emergency Brake Assist
Colour coded Door handles and mirrors
Electric windows and electric heated mirrors
Climate Control Air Conditioning
CD/MP3/WMA RDS Radio with 10 speakers and steering wheel control
Priced from just £22,495 OTR
In showrooms from late September, available to order now
2.5 WRXS - Special standard features :
Prodrive Performance pack delivering 255 PS @ 5400 rpm and 390 Nm torque @ 3000 rpm
Prodrive Exhaust System
STI Front lip spoiler
STI Rear roof spoiler
Momo Air-race gearknob
WRXS branded mats
18" GT1 Alloy Wheels designed using Finite Element Analysis for improved handling
Pirelli P-Zero "Nero" 225/40 ZR 18 tyres for outstanding grip
STI Front Grille
Available in San Remo Red, Obsidian Black Pearl, Satin White Pearl and WR Blue Mica
OTR £22,495 +
Optional £1600 leather trim +
DVD Mapping Sytem sat nav £260 +
Rear View Camera £650
= £25005