I got a 2.5GHz 15" MBP the day the new Penryns came out, and I've been very happy with it. I've had no display problems so far. It is my first Apple since my parents bought an Apple ][+ in the 80's. I used Macs during my college days of the late 80's, too, but this is the first Mac I've ever owned.
Before I bought a Mac I experimented with Ubuntu 7.10 on my PC. While it worked just fine, there were a few apps that I just had to have that could run natively on my chosen OS (QuickBooks and Slingplayer are the main ones). I didn't want to have to VM Windows for them. Since there were Mac versions of those apps I could easily switch to a Mac, and so I did. Now, other than some games, I have no need for Windows. A few of the games I have work fine in Crossover Games, so I play them that way and Boot Camp for the ones that don't.
I also bought a 500GB Time Capsule and my first iPod (4GB Nano) in the few weeks after getting my Mac. The TC was planned (even if I didn't end up with a Mac), but the iPod was not. When my Treo 680 started acting up playing music I decided to go for a dedicated music player. I picked iPod because I knew it would be easier to use with the Mac. Creative Zen was my rejected option. I'm very happy with both choices.
Someday I'll get my wife to switch to a Mac, though she may end up using Linux instead. She doesn't have any specific apps that don't exist in Linux, so it would suit her needs just fine. Her PC works just fine for now, though, so there no Mac in her immediate future.