I have had a Roland VS1880 for 5 years and it has never failed on me, I love that thing! I have never had any problems with any roland gear come to think about it!
i have a alesis hd24 stand alone 24 track. it's not one of those all in one units with the mixing board, effects and preamps built in like the ones mentioned in this thread. i think those things are cheesey. might as well get a computer interface and multitracking program. it would most likely be cheaper and definately be higher quality and more flexible.