if the radio is clean, ANY texas star-other then the little modulators-will work pretty well on 10m. what does it look like on the scope? not a clue, but i am sure no worse then many radios on 10m-INCLUDING some legitimate hf rigs. how will it SOUND to the receiving station? past experience has proven JUST FINE. like i said, clean SOUNDING in, clean SOUNDING out. don't split hairs, cause i know i know. as the others said, 100 is more then enough. i use 100 watts or less from my ic706mk2g in mobile #2 & mobile #1 has a magnum 257, 50 watts-hmmmm, was that ME in the 50 watt mobile, bj ;-)-and i get out just fine. mobile #3, which currently 'isn't', had a dx500v with the magnum & not a 2x1 extra class old timer was the wiser, nor were the audiophile ham cops. for that matter, i've run into quite a few 2x1 extra class oldtimer ham cop-types who run the 257, 2510, 2950, etc YET they criticize newcomers on eham & the zed. double hmmmmmm.
if you have a 1600, GO FOR IT. if not, & you want some more power, go for a 350 or 500.....just remember, splatter irritates 'real' hams quite a bit....