i'm impressed. that is quite a decent looking build. you even chose DDR2-800 which is the way to go i hear
as the memory controller apparently doesn't like the odd numbered DDR2-533 or DDR2-667.
i had a 6200TC and they do perform better than people give them credit for but they really are not that great. i believe the 7300GS is in that price range and is supposed to be significantly better not to mention includes the perks of the 7XXX series.
i didn't say you can't have the temp readouts, you just asked for an alternative for that case. i don't know of any cases that have guages like that one but you can get devices that take the place of a cd/dvd drive and have similar guages