You don't want to get a Phenom II when bulldozer is not even launched but wanna get a Core2Quad, after which two generation of new CPUs have been launched? If it looks like a better alternative then go for it, what more I can say.
Skud, buying and AM3 based platform is not at all any dead end solution.There are plenty of budget AM3 motherboards available from MSI, Gigabyte and ASUS with already confirmed Bulldozer CPU support. GIGABYTE GA-880GM-USB3 AM3 , available @ 4.75K has Bulldozer support.
I also had a E7300 and Instead of C2Q I went for PII 955BE with The same mobo Cilus mentioned here which has AM3+ Socket. i.e. BD Support already.
This one has given me very good boost even at stock and tbh above 3 GHz Quad it doesnt matter much thats its a i7 Extreme or Q9550 as at HD Resolution both will give you more than playable FPS. There is a topic on Anandtech Explaining this already. (120 FPS & 50 FPS may sound huge in bench but as long as they are above 30 it doesnt matter for user)
So Go with the Cheapest Quad PII 955 BE and forget about upgrading CPU for gaming for a long time.