Yet another hard drive question.

I'm going to buy a new HardDrive for my laptop. I'm looking for a 160gb SATA (Seagate), instead of my current 80gb.
I was going to buy a 5400 rpm model (ST9160821AS). The recording method of that drive is supposed to perpendicular, which is considered a good thing (but I'm no specialist...)
But now I'm hesitating : should I go for the 7200 rpm (ST9160823AS )?? This one uses similar technology (perpendicular), but Seagate also mentions "16/17 EPRML" (I thought that was pretty standard, ….. anyway). Seems faster according to the specs, but I wonder about 2 things :
- Heat (will my laptop run significantly warmer ?)
- Battery life (will the battery life decrease significantly ?)
Anybody ?
Thanks!!










- carpe noctem



)
I hate it when that happens. So, Darwin, let's weep together (until friday, or maybe the 28...) It'll be fun though when I finally get it -- especially for 1) storing more cra...err... essential stuff, 2) and for backups, indexing, farr's search, etc. Woo hoo! maybe X1 will actually start to feel responsive.
FWIW, if it was me and I could get it in person for $179 + taxes, I'd take that route...
Somehow, everything I ordered through eBay never went through this lengthy and costly process...)