Worth the upgrade?

[skeezy]

Ok, thinking about upgrading my desktop but is it worth it? specs are as follow,
Desktop
CPU:core 2 quad 2.5
memory 8gigs DDR2
HD's are a 750gig and a 1TB both are 7200rpm
Graphics: Nvidia GT220(the bottleneck in my sys i think)

Now i was thinking of upgrading to an I7 with dual Radeon Cards and at least 8g of DDR3 but was wonderig if I would notice a huge difference? my setup is just fine, even with all 7 toons but was thinking of boosting the grapthics on the main to Ultra instead of only good?
Thanks for the Input

[Sajuuk]

WIthout investing in a completely new system you could certainly upgrade the graphics card and possibly get a solid state drive. If you decided that wasn't worth it and got a new system you could migrate the parts you wanted over.