Got my Macbook Pro 13, love it. But I'm still getting an Envy 15, if they refresh it with backlit key's, e2e, and the cleaner keyboard like the 14/17 have and the new Pavillion line will have (which is going aluminum and updated as well now). Then I can have two badass computers on each system. The 1st gen Envy's had some issues (hp bought voodoo and starting playing around), the new ones though are excellent but the i7 quad sucks battery life and gives a lot of heat, the 540m I5 is the bomb overall imo. but between the two os's, Windows 7 is so good now I have no complaints, Vista sucked donkey balls and I had all my computers still running XP b/c of that lol.
But I'm loving this Macbook Pro 13, for some reason it feels more solid and better quality than the 15/17 maybe b/c of the size? This one is a 2.53ghz, 4gb mem, and 500gb hdd, excellent performance. I think apple still has a slight advantage with the track pad but HP released updates so the Envy trackpad rocks now, but I think the MBP feels slightly better to the touch for some reason. I'm suprised at how quick this computer is, I don't really notice a difference between this and say a mid level i5 and possibly a top i5.