Looking for a new, good CPU, need advice, Is it a good time to upgrde?

Hi, I currently have the pc with the following specs:

Core 2 Duo E6600
ATi HD 2900xt
2 Gb of corsair XMS2 RAM
ASUS P5W DH Deluxe motherboard


I was thinking of upgrading my cpu, the pc runs fine as of now, but on some game slike sup com...well it is clearly held back by the cpu.

I was looking into geting the(Wolfdale) E8500 clocked at 3.16 Ghz for the price of $189.99, since I think Quad cores are still expensive, and for the simmilar price I would get a 2.44 or around that clocked CPU(Yorkfield if im not mistaken).

I heard that the Wolfdale is a "middle" cpu, and a new (forgot the name) will come out in Q4 of this year, that will be better than Wolfdale, and will be priced similarly, also a 45nm cpu.....got out of the loop in around 2007

So my questione is as follows:
Should I wait till the new family of cpu's are released? Since with what I have now i think i can probably live ok (since i did built the rig in 2006, as soon as the e6600 came out, and I planned to upgrade in around 2009/2010, and I aded the 2900xt in 2007.).....and im deffinitively waiting for the new dx11 gpus that'll come out in 2009(the 5x00 ati series)

Thank You for any information.

wait.

if you want a boost you should overclock the cpu you have now. or if you want to buy a new one, just wait

Overclock your current cpu for a free upgrade. If that still isnt good enough look some GPU charts and see if a graphics card upgrade will get you the frame rates you want

WAIT...

Ive got an E6600 atm too and overclocked to 3.2ghz its formidable. get yourself a decent cooler and a new GPU will help you more.