I can only suggest going with am3+, in the long run it'll probably save you more money than older motherboards will now.
If your not into hardcore heft priced items, there are still cheep options out there for AM3+, even CPUs are cheap for this board as well, because you can use am3 CPUs with it
Again RAM isnt that costly anymore. DDR3 ranges wildly in price, but you can fill 4 slots for around £50 now
Although if not, good luck and take care