Remember you will have to buy memory as well... although DDR3 is VERY inexpensive right now.
Get a AM3+ motherboard if you plan on upgrading in a year or two to a Bulldozer CPU. LGA775 and DDR2 are still competitive now but are getting outdated.
There's no point in investing in LGA 775 right now as it's already two sockets back for Intel. The only reason to get an LGA 775 CPU is if you already have a decent lga 775 setup or you can get it dirt cheap.
yeah i already have the e7500 butmy motherboard is running at at 1.6 ghz and i can't change the fsb so i'm just gonna upgrade my motherboard and switch to ddr3.Seems reasonable right? if i had money i'd definitely upgrade but i'm just gonna do this till my xmas bonus i think
Well in that case get some good RAM you can use in your future build, the one you plan to do after Christmas, and a decent board with DDR3 and overclocking options. Overclocking that CPU should give you a good boost till then.