I thought you might want to read this........I think I am going dual core. I think as long as your mobo has LGA 775 socket then you could do dual now then get quad later when it is needed (more programs and games)....This is my current plan...Hopefully this has helped you.....
[blockquote]Arguably the most popular CPU right now, the quad-core Q6600 once again stakes its claim as one of the best bang-for-the-buck options. You can get similarly priced quad-core courtesy of the Phenom 9500 (2.2GHz), but with the Q6600 generally besting even the not-yet-available Phenom 9900 (2.6GHz) we see no reason to go that route, unless you already have an AM2 motherboard and don't mind second-class performance. This is perhaps the final hurrah for the Q6600, as the faster, slimmer, and more overclocking friendly Q9450 is due out in January of next year. That may necessitate the purchase of a Penryn compatible motherboard, however, so if you don't feel like waiting there's still plenty to like with the Q6600.
There's still a shortage of software that benefits from more than two cores; however video encoding, 3D rendering, and certain other tasks will appreciate the extra cores. It may be some time yet before games truly benefit from quad-core, but for $260 you can be ready today for whatever CPU requirements the software of tomorrow brings. If you don't mind overclocking, with appropriate cooling we've also hit over 3.4GHz. Just don't look too closely at the power use of the CPU when you're overclocked that far. Alternately, if you don't want to overclock but you still want improved CPU performance for dual-core applications, consider the E6850. Clocked at 3.0GHz and priced only slightly higher than the Q6600 ($276), for games you will still end up with better performance and less power use by going the dual-core route. (E6550 and E6750 are also reasonable options, naturally.) If you want more than the Q6600, we wouldn't bother with the Q6700. At roughly twice the price, we'd recommend a minor overclock first.[/blockquote]
Quoted from Anandtech.com [link=hyperlink url]http://www.anandtech.com/guides/showdoc.aspx?i=3157&p=2[/link]