Interesting that the SS10 minimum watts recommended are 200 while the Ht3 are100 watts.
I would not put a lot of stock in an older model power recommendation of 100 watts. The HT3's require significantly more to really get all you can out of the speaker.
Sure, you can just about drive anything with 100 watts but not to it's full potential.
I still say the HT3 is harder to drive than the SS10. (a general comment) I kinda wish folks would stop messing around with low powered amps when they have invested so much money into good speakers. Go 250 wpc or better for either and you are in good shape, 500 wpc and you are rock solid. Don't wimp out on the watts with these speakers. They are not SongTowers that can sing on 25 watts.
The SS8 and HT2 are more like the ST in requiring less power because they are in the 87/88 db area. 200 wpc or better is fine for these models.
The top end of the SS10 seems like it reaches it limits uniformly and the bass is the item you need to support because they can really dig deep and need control. A good solid amp that can do both is desirable.
Tom, you will not have troubles with your existing amps with SS10's.