Not a whole lot of help for you, as I've gone away from other grips and gone to all E2's on my 229, 228's, and 226.
My standard light right now is the TLR-1, due to cost, functionality, use, and memory. I'm sure there are better/brighter/more expensive, but I've had good luck with them and continue to move the several I have from gun to gun as necessary.
I have the SRT in the 226, and may eventually put one in the 229, but it sounds like you've got a good set-up.