welcome to the club.... the 06 wrx is a great buy since it now has the 2.5 liter. more torque and the 2.5 liter will hold more power on stock internals compared to the previous generations of the wrx.
the wrx in general is a great buy. you get a lot of car for your money. AWD, 227 hp (230 for the 06 ), a turbo car that is very reliable, great in all weather, and has great modding potential.