No body for GoAsm ? http://www.godevtool.com/
I've tried it, I like well their philosophy:

"My aim here has been to make an assembler with clean and obvious syntax, which is very quick, and which always tries to produce the smallest code. GoAsm also has some useful extensions to make programming for Windows easier. It supports all the SSE, SSE2 and 3DNow! instructions and now has enhanced support for making Unicode programs. "

Actually I've followed your choices: Masm + RadAsm.

Does anybody know well GoAsm ?