I agree with the other replies, the best choices would be
M3700, a 32 channel if you can get one, has automation (volume, mute, effects, eq on/off) which is nice when mixing. has inline monitoring.
M3500, same as M3700 but no automation.
M2524, will be cheaper then the above 2, has inline monitoring and midi mute / scene control.
These 3 consoles were designed to be used with the MSR16 by Tascam. I have used a MSR16 with both
the M2524 and
the M3700 and it's a nice set up. I still own
my MSR16 a M2524 (used for live location tracking now) and a M3700 (main studio console).
Cheers
Alan.
p.s, the MSR 16 has -10db unbalanced in/outs, the 3 consoles I recommended are also -10db in/out on the direct out and tape returns so they match, some consoles will have +4db balanced so you will have a level matching problem, so check what the console is before buying. Also
the M3500 and M3700 did have a balanced +4 option, most of the consoles around wont have this (you don't want it if using a MSR16), the consoles with the +4 option have "D Sub" connectors on the back, the standard -10 consoles have either RCA or Jack Plug direct out / tape returns.