[ARC5] which modules?

[J Mcvey via ARC5]

which modules do you use?
I guess the c-29/ c-30 transmitter control are a given, but what is the difference between them?

I don't need anything fancy like remote tuning since the receivers will be operated locally.
Is the c-48 a good choice? The like the small size of the c-126 but it is not exactly  what I need either.

Any input on these boxes and their functions would be appreciated.