I bought a T-mars after having had a Reverb previously.
Was horrible, clunky, hardly ever hit the right spot to locate the pin, the remote was rubbish to use and hard to gauge how much pressure was needed to activate.
The clamp to rail height was huge, this is a big consideration as I see it.
I would go for a cable operated but tidy model like a KS E-ten or similar.
Ideal scenario is a Stealth Reverb, they are the nicest I have used.
Would be good to try a new raceface or 8point or whatever they are called.