Anybody want to let me know how pleased you are with the XP 50 or 60? im going to buy one and im deciding what 2 buy...

That depends on who you ask. I've owned my xp-50 for over a year and a half. I love it. I has great sounds. The only bad point i have at the moment is this... If you're a begginer when it comes to sequencing, I still find it difficult to do. Be prepared to do a lot of reading and research. That's all

Check this site and www.sonicstate.com , (click synth site) for reviews.

If you've got the dough the XP60 is better because it has the arpeggiator, the large graphic display(great for newbies), sound palette sliders, more inputs/outputs, better keys(?)

The XP-50 and the XP-60 have both great sounds and they are OK if you are going to use it just to play on it.
The XP-60 has more functions and better control than the XP-50.
But if you are going to use the sequencer (on the XP-50 or XP-60) to make and record songs with several instruments on, you´ll have big trouble sooner or later. Sometimes the drums can´t keep in time and voice polyphony doesn´t come up to the 64-voices as it should. On the contrary, far from that. There are some more defects too.
If you intend to buy one of those synths you should really try it before, specially the sequencer.
Good luck!!!

I was just about to purchase an XP-80 but I'm concerned now about Dani's post in regard to the drum track timing and the polyphony. I do large orchestral arrangements and really need the 64 polyphony. Has anybody else had this problem that Dani describes?

No that's not a big problem. I have an XP80 and haven't noticed this. I speculate Dani
doesn't have enough experience with Roland XPs. Ofcourse I don't know him so can't say for sure. I haven't heard talk about this problem in my users group. I know though, that when I try to switch track/parts while still recording, that will screw up my drum track. Ya gotta stop recording to switch tracks/parts.