Well I was expecting to run into you here as i read in a thread that you recently bought the MBP 13. Thunderbolt eGPU is the only reason i started looking at the MBPs. After i sold my r3 i originally wanted to go for the m18x but then i decided to check out an eGPU solution instead, after reading up the numbers on an x220 + express card eGPU i did not think the numbers were that good. Next i checked out thunderbolt and my original choice was to go for the Vaio Z but Sony implemented LightPeak in their own sort of method thus it was a no go. Naturally my next option was the MBP. I wanted the 13 but sadly the display was only 1280x800, so naturally i decided to go for the 15inch model. With the HP i will probable have to sacrifice my gaming need but i really liked the laptop. And after doing research about the MBP i am liking it more and more. Yeah i checked out most reviews but dont know why they just give the case temps, all i care about are internals. Did check out a few thread here and on NBR and got somewhat mixed conclusions, some claimed temps which were normal while a few had temps which were alarmingly high.
I was on the same spot as you regarding the vaio Z, I needed a laptop NOW, my gpu had died and it wasnt using thunderbolt, thus the choice was quite between the mbp and the x220, since I could grab the mbp for the same price as the x220 and just walking 15 min from my home to a store, it was a quite easy choice, since the x220 I would have to import fromt the US.
The case temps are the thing that people nag apple about, they say its scorching hot and so forth thats why the reviewers usually post those numbers. Regarding temps of the innards, they are depending on when you bought, quite good, they usually hover in the high 80c, in the latter macbooks, if you want to buy one that is refurbed and bought when it was at launch or close to it, the paste job is quite atrocious and repasting becomes a necessity. Im going to repaste mine when I get the memory and the caddy, but when I play very cpu intensive games like europa universalis 3 (yeah its old but when you are late in campaign its quite heavy on the cpu) I get high 80c, granted this is the 13 model.
With IC 24 Im expecting to lower the fan rpm, not to drop in temps.
btw regarding the egpu thing, Im watching it closely, will be sure to drop you a pm