Hi
I use a Roland R-05 which is my first gear so I am still a newby...
R-05 was cheaper than a M-10, about 180â,¬ in France.
It is built in plastic but I take care of it.
No line out, just a small USB plug that seems to be a bit slow when transfering large files.
Line-in and mic input on a 3.5 jack.
Battery life is OK, I have seen 2 shows (about 4hours) and I think I can still use the same batterries for more than 4 hours more.
Hope it can help you
Tom