Looking for a SS integrated Amplifier recommendation going into a new system

So..... I actually did an extensive 2 day demo in my home, blind side by side comparison of the Sierra towers with RAAL vs B and W 702 s2. You can see the results at AVS forum. Do a search on Ascend acoustics sierra tower vs 702 s2 and should pop up. In the end, the B and W speakers won the competition and ended up in my home for two years. I have since upgraded to Legacy Audio Focus XD speakers which are in a completely different league. Like you have have category’s of jazz and female vocals on my system so we are definately alike on that. The Sierra towers are wonderful speakers. Of all that I could bring into my home in that price range, they were 1 of 2 on my radar. Bottom line to their biggest weakness in my opinion was base. I suggest a nice pair of Rhythmic subs to compliment the towers and you will be very happy with just about any amp you would want to throw at them. Their strong point where they won out over 702s2 was just flat out rock and roll.... they kick ass but sounds like that is not your gig. Anyway, again, you cant go wrong with the sierra towers. They look pretty cool too.

AYRE AX-5 integrated amp.
Happy Listening!

The Krell K300I....sweet unit. 

I have several kits, including the new Technics Su-R1000 easily driving Floor standing B&Ws with ease and it is an amazing 10K digital amp. However, as the OP has indicated a preference for Class A/B amps, my experience with those is also profound. I know many responses refer the Luxman 590. It is an excellent amp. Personally, I have McIntosh separates in my main system and a MA-:5300 running LS 50s in a small offi e set up. 
All produce excellent yet different signature sounds. My current favorite though is the new MICHI Line. I heard both the MX 3 and the MX5 and they are on your price point, heavy well made and amazingly dynamic. They range from. $6 to about $10k and are quite a package. 
Whatever you choose as always is subjective to your personal spund tastes and peripheral equipment being amplified. Good luck in your purchase. 

Pass Labs INT-60