Is my Amp OK?

Sonic differences between well designed amplifiers are minimal at most. All relevant measurements of good amplifiers show imperfections that are well below human hearing acuity. The only remaining things that matter are the potential for gain mismatch on the input (not infrequent) which can lead to clipping and a harsh (some say lively) sound, clipping of the output because of insufficient power (not an issue in your case) and load sensitivity (not likely with this combination). In short, relax.
The only potential sonic issue is room acoustics  and it will be many many orders of magnitude larger than any minute differences between this and another good amplifier. Of course, if you compare it with an other amplifier you may hear differences, but that will be because many audiophile amplifiers are far worse, even if more expensive.

What makes you hear that its not?

What, in the sound would you want to hear/feel different? Subwoofer?

I've heard these are great amps/speakers and you should have more then enough power so tell us what is missing!  Have you tried other amps to compare?  If not, haul those speakers down to a good shop and let them help you.  You only want to buy from somebody that cares enough about audio that you get what you need.  We would all like to have 100s of thousands in our gear but that is  "Stupid Crazy". Friend of mine coined the phrase...

these and other exciting ideas.

jhv

Whoa! Hey! What?! Minimum differences between amplifiers at best? Is someone channeling Julian Hirsch, the bullet headed dude from Stereo Review?

You can read all the magazines out there that audiophiles like. 

SS vs tubes and all that crap can be discussed until said "cows come home" but nothing works as good as your ears. 

Take care trusting reviews but use them as a guide to help direct you what to trial.  Everyone hears uniquely, likes different types of music, and what you like might not work for someone else.

What works best with your budget and existing gear?

Take your time to do it right and you won't be upgrading for a long while...

jhv

But do I really need to upgrade?