I have a 3000 and I just got a 1000 for live stuff. I've also had a 2000xl and a 60 before. Basically, I think the 3000 is made a lot better than the newer ones. It feels solid and not like junk/plastic. But it misses a lot of features that would be very useful depending on how you work. There is no track mute page on a 60/3000. If I was going to buy one right now, knowing what I know and I would only have one, I would get a 2500 just because of the convenience factor.
Most people really can't tell the difference between the sound and the features and convenience of the new one just make it easier to do stuff. For me, the less resistance I have to completing a song, the better. Worrying about a scsi zip drive crashing or having to recap a 20 year old power supply is not really that sweet. With all that said, I'm not really a gear guy anymore. I mean I used to be, but I'm more interested in the outcome now than the means.