It really depends on what type of gaming you're doing and especially how spectacular you want to run the games. If you're playing some really sophisticated games *AND* want superb graphics and rendering, the choice is obvious: 1 laptop for regular stuff, 1 desktop for games. A 10lb gaming laptop defeats the purpose of having a laptop, plus they are ridiculously expensive! It's just not practical!
However, if you aren't going to cry because the graphics aren't spectacular, purchasing only a laptop might be a very wise decision (save $, more practical). This is what I did...
I got the Dell E1505
1.86GHz Intel DUO (wonderful)
256MB ATI RADEON X1400 (great graphics card, but not the best)
1GB Ram
15.4" Truelife screen (excellent)
I got the computer above for $1130 SHIPPED (after tax/shipping). I applied a $600 discount which unfortunately is no longer available. I'm sure you can still price the same computer for about $1100 if you want (w/ current coupons).
I also wrote a review on the cpu, which can be found here:
http://www.notebookforums.com/showthread.php?t=146995
it plays games well and is a very powerful cpu. Read up, it's worth it
