I second that. If you want, feel free to send me your 3000+ after you buy the 3400 : P I'm on a 2200, and I don't see myself upgrading until they're offereing high 4000's or even 5000's.
The FX-53 would destroy that 3000+ That good thing about the 3400+ is that it is alot cheaper then the FX-51, but just as fast if not abit faster
But you still have an update CPU there, and it's really not practical to buy a $450 CPU right now when you just bought one and were on the verge of new technologies
Well, if I had the money I might do it for that reason too
As for Mobo's I don't really know, but you might want to wait for the socket cause then you can take advantage of dual channel, unregistered memory Registered memory is REALLY expensive, upwards of $300 dollars I believe