I have owned the very first white MacBook (bought it on release day). Then bought the aluminum MacBook Pro 13 inch. Now have the retina.
With those, I have always maintained a desktop PC running Windows (Core Duo, Core 2 Quad, now Core i7). I've never felt like I have been sucked into one...
After having a 2012 rMBP since it came out, I can guarantee the $2300 I spent on this machine was worth it. I love this thing to bits. It's so solid of a machine and I don't regret it one bit. I've never had issues and its been a joy to use.
Pentium 4 660
Pentium D somewhere in here
Core Duo T2400 (Socket 479)
Intel C2Q Q6600
Intel i5 4670k
All except the last two were engineering samples. I had a lot before the 660, but I can't remember them. Mostly same gen 478 engineering samples.