Welcome,
I'm far from an expert myself but for what its worth i use a similar set-up to the one you are describing and am very pleased with the results. I currently use the Onkyo A-9555 in my 2 channel home theater set-up with a pair of fostex based (fe-103) tekton design single driver speakers (93db if i remember correctly). Obviously not a bass heavy rig but sounds very natural, not harsh at all. The motor driven volume pot on the Onkyo is a thing of beauty and will give you plenty of room to work with. Also of note for a solid state amp the A-9555 has a low damping factor (25ish) which works quite well with the higher efficiency single driver designs. Keeps them from sounding so "thin" from my experience. I almost forgot that it has defeatable bass/treble controls as well. If you can find one used its really quite a bargain. For some perspective my other amps are an Almarro a318a, a gainclone, F5, Trends and a few others that I've since sold. The Onkyo does quite well especially considering its features.
Regards, Daniel.