The closest thing to rack mount gear I have is my Line6 POD X3 and my Boss GT10. Having said that, I have a bunch of pedals as well.

I've been told many times that pedals sound better than all in one units. I'm not hear to debate that, but I will say that I do like how you can mod your pedals easily. I think half of my pedals are modded.

However, with my Boss GT10. it is sooooo nice to be able to dial in a tone you like, save it as a preset. Then, create another one if you like, save that, on and on and on.