Go for the MR-8 or MR16 and have even more fun!
Seriously, I have been through the experiences of four track tape, DAT, Mini Disk and finished, finally, with the MD8, I now have
a MR-16 HD/CD.
The greatly increased flexibility both recording and for editing plus the greater compatability with current file formats (.wav and mp3) make digital a worthwhile move.
My current choice, based on a trawl of the User Manuals, downloaded as .pfd files, Showed the Tascam as being limited on inputs (2) and the Zoom to be too sophisticated for my simple mind, so the MR-16 with 4 inputs, 16 tracks, logical architecture and (limited) effects, the best choice for me. It came closer to the old style of tape recording than the Zoom and I had the added facility to produce CDs without recourse to a computer.