Upgrading Computer

[AlexWolf]

I made my computer a few years ago, and I am thinking about upgrading it at the moment. As long as it doesn't cost too much for a reasonable increase in performance. I have an Intel e6420 at 3.0GHz, 2GB GeiL Ram, and ASUS P5K Deluxe and an ATi 5750.
I am prepared to spend around 300-400 pounds (I already have a tuniq tower so i don't need a cpu cooler really).
I was thinking about getting an i5 2500k and then an Asus P8P67 mobo with 4gb of Geil ram.

I play games quite a bit (but mostly games which won't require an upgrade), but I also use Solidworks for my university course.

My most important question is if an upgrade isn't essential, is it worth waiting a few months (anything expected to be coming in Q2 which is a big step up?)?

Thanks for any advice

 

[AlexWolf]

I also have a corsair 520W power supply

 

[AlexWolf]

That CPU won't allow your i5 2500K to be overclocked at all, therefore not much point going with the more expensive P67 motherboard?!
.

Why cant the i5 2500k be overclocked at all?

I don't really see the point in spending too much on a new graphics card when i bought one around 8 months ago (i needed a cheapish replacement then). But I guess if i bought a new graphics card now then I could upgrade my mobo/cpu/ram in the summer.