Getting fancy--replacing pressure valve w/ thermostatic valve

[PreciousBusterbird]

Hello--I have a question. Pressure balanced or thermostatic?

I'm replacing my tub and tiling the alcove, so now is the time to do other little upgrades. So I got the Hansgrohe Raindance Connect and have decided I need to change out my Delta Monitor 17000 volume control/temp (pressure-balanced), trim, and tub spout w/diverter.

I want to get a Hansgrohe thermostatic valve, trim, and tub spout with no diverter. The trim has the added feature of an integrated diverter so I will have a nice clean tub spout.

The thing is, I could use my existing Delta stuff with the new shower. But will I regret not having a thermostatic valve? It seems as though people really like them.

Thanks very much.

-Casey