I ordered with the T7200.
When you make the jump to the T7xxx models, you get 4MB of cache which is advantageous, not to mention the clock speed difference. The 140 mhz clock difference may not seem like a lot, but anything you can get in terms of clock speed translates into more power considering it's a Core 2 (140 mhz difference in a P4 3.0 ghz makes basically little to no difference.)
HOWEVER, that in mind, there are going to be other limiting factors on your machine slowing your performance. I ordered the 5400 rpm drive, but I've heard people say that the other drive (that comes as an option and is super expensive) is noticeably faster, (although it does suck up more power as well). Moreover, a T7200 won't be noticeably faster than the T5600 in a lot of applications, but you will definitely get an increase in others...read some benchmark threads... just search
I really wanted the nice round 2.0 ghz and definitely was interested in the full 4MB L2 cache.
read specs for more info.http://processorfinder.intel.com/Lis...sSpec=&OrdCode
Also, i'd say check merom benchmarks to see exactly how much faster/slower the chip is in your specific area of interest.
In terms of gaming, don't expect a huge difference between the 2.0ghz and the 1.86ghz. For games, again, it's a bottleneck issue. The 2.0ghz 4MB merom has LOADS of power for physics & gameplay processing... But the video card (yes, the nvidia one, not the shitty intel one that comes stock) is still nowhere near up to spec in terms of performance. If you could integrate the T7200 with a really high end video card you'd see *excellent* gaming performance. (not that gaming is bad with m1210... read some threads on that, its a different issue) actually, the benchmarks where the core 2 is not much better core duo, or where the t7200 is not much better than the t5600 are the benchmarks were the CPU has minimal effect on gameplay processing. the problem is getting big, powerful video cards that have high space, heat, and power requirements into a laptop.