There is NO future to the 775 series CPU and motherboards. If you've got a hand-me-down, then the Core 2 Quads are the best for gaming. They are about four generations behind the current Skylake CPU's.
As for the graphics card -- I'd say look at the Toms Hardware Graphic Card Review, but it hasn't been updated since June so it's lost cause. And for under 100 pound you won't be able to get a 'great' graphics card, but you can get a decent one.