Suggestions for an integrated amp?

You have a very nice little system already. The A3 is a great choice. I had a Jolida 1701a for a while and thought it was good but lacked resolution. Your speakers would make that too obvious I think. The A3 won't have that problem.

As S7horton says, the Audio Refinement Complete is very very nice. But if you want to get into vacuum tubes (which I highly recommend), the Consonance Cyber 100 that is up for sale here would be a great choice. I have no connections with the seller. I am very familiar with the Consonance M100 Plus - it was a super nice amp for the money. Unless you really like music loud, a 40W tube amp would work great.

Arthur

I owned the A3 previously and would highly recommend it.I also owned the 3.2 and liked the A3 better.YMMV.Incidentally ,I believe the A3 is 170 watts into 4 ohms,if your speakers are 4 ohm.
tracer

s7horton , you can view my system by cliking the link right on the bottom of my message, thanks.

You're right. My fault, I usually pick up on that. I've had great success with the audio refinement and B&W (CDM 1NT). I've also had great success with the A3 and signature 805's)

I guess it depends on how much you want to spend. I think the AR could be a big improvement over the NAD, although they are the same power rating.. The A3's can be a little tricky to find. I wouldn't mind grabbing one myself. The AR's are a little easier and should be 100 to 150 dollars cheaper than the A3.

I can't speak about the 3.2 as I have never owned it, but would love to try it.

Honestly, in your situation, I would go for the A3 if you can one used.

One more thing, the MF X150 is a great amplifier as well. And, come to think of it I prefered my x150 over my A3. It has more power and I feel is more refined. Those are even harder to find and sell quickly. But, if you can grab one, that would be worth the 650-700 dollars they cost.