Overall, I tend to be more of a Nintendo fanboy!
Still, I made the decision to buy one of the two HD-consoles;
Here is how I made my choice:
PS3 vs 360!
Price 400 vs 300.
Format Blu Ray vs HD-DVD (already dead by that time).
HDD 40GB vs 20GB (Except for Elite but that's way too big for me... For that kind of storage I have my PC at 1.2 terabyte).
Games Less big games on PS3 at that time... Although it had MGS4 coming, which I knew I wanted. 360 games you can also get on PC except for maybe Halo 3. And my PC can handle that stuff so obvious choice there.
Quality I don't like the fact of knowing something is gonna crash sooner or later whilst I paid 300 euro's for that specific piece of hardware. I'm talking about RRoD... If that stupid Hardware malfunction wasn't around I might have bought a 360 instead... But we'll never know I guess... Also, the DVD-9 format for a HD console is not well suited I.m.o. Also, the original Xbox had only a lifespan of 4-5 years. Buying an X360 in the beginning of 2008 wouldn't be of that much use when you can pick up a PS3 that i.m.o is a better choice for your money a.t.m!
So, from the standpoint of a Nintendo fanboy; Go PS3... It's worth the extra 100$ (or euro's). But that's just my opinion!
PS; I really don't care what company is behind what console (except for Nintendo consoles, but I buy everything they publish in terms of Hardware).
I don't care because I know I'm so small to these multi-billion dollar companies that it doesn't matter what I buy or don't buy to them and thus I won't let my ego get in the way of that!