I lost my first 350 in a wreck, then purchased a brand new 2011 Evo X and went stage 2 almost immediately. Look where I ended up
The performance was fun, but if OP is truly looking to "downgrade", he probably won't be happy jumping to a mid 2000's WRX from a 370. I wasn't happy with the Evo. Then again, if looks aren't high on the list...
A boosted 350 would be a lateral step from a 370. Cheaper, still a Z, and fast.
