The M5000 is dope, as the kids say these days. These boxes were expensive as hell when they 1st came out, so if you can hook up a good deal, I'd highly sugest it.
Some of my favorite presets are:
480Hall
5000plate
CDmaster
The Algorithms in "Delay 1" are similar to the 2290. "Delay 2" are similar to the TC1210 (which I'm a big fan of). The "Reverb 3" bank has some on the densest reverb tales I have ever heard on a digital reverb. The "Phazer" on this box sounds killer on Hats) similar to the TCXII pedal in stereo). The C.O.R.E. bank is also really good for drum verbs that you don't want to go ape $*^t with.
There are several options you can get on this box like, an ATAC remote (kinda like a larc), 2 or 4 engines, the ADA 24/96 card for higher sampling rates), and Simm ram (for up to 390 sec of sampling).
I fell in love with this box during a long run in an AMS/Neve Capricorn room in LA.