I had the 2488 mkII (same as Neo except smaller hard drive, fewer "mastering" tools) and liked it very much except for one thing...the MIDI synch was faulty which totally hosed it for my application (hardware sequencer MIDIed to 2488). It worked perfectly if you started playback at 0:00 but when you fast forwarded around a song for punches, overdubs, etc. the MIDI clock position would get out of synch, bad news if you needed to do a punch at the final bar of your 35 minute prog rock epic
I did contact Tascam to find out if I had a lemon or it was a problem with all units, they were unable to help so I sold it and took the leap into Ableton Live. If you want I can give you full details offline so you know what to check for if you plan on buying one.
The OS of the 2488 (still used in the new DP-24 and DP-32 SD-card machines) is somewhat dated when it comes to file transfers to a computer and a few other functions but overall it was a very nice machine. Depending on your needs, choosing the Neo vs. one of the DP models would be based on how important certain features are...the 2488 has SPDIF in and out but the DP do not, the 2488 has an internal power supply, the DP uses a wall wart, DP cannot do backups to CD-R, etc. I would only buy a 2488 if a particular feature that was dropped on the DP is critical for you.
Since your first post said "quick sketches" I'd say a 2488 is overkill, though.
I listened to Hatfield and the North at Rainbow. They were very wonderful and they made my heart a prisoner.