Looking for an integrated amp around 4000 to 5000.

If you liked the ARC sound, I think you'd be happy with their Vsi75. I've seen them used in the $6500 range.

Like someone earlier stated. The Manley Laboratories, "Stingray Integrated", sounds comparable to many Hi-End, "separates". 
It is basically their "Mahi", mono-block design. Just two of them built on the same chassis with a preamp section as well. .It also comes with a nice remote. Also a In/Out loop which I used for pre-out to my subs and crossovers. So you can have subwoofers in stereo also.. But you could "Sum" for just one if needed.
I just happen to have one too.. In case you would like to try it. "I now have several sets of the, "Snapper" and also, "Mahi", mono-block amps for use with my mains". The tubes have low hours also. That, since it wasn't long, "About a week" after purchasing it that I went for all the mono-blocks!~
and the Neo Classic 300B preamp.....

While Parasound does have a warm cuddly sound, they are class A/B, and do run warm. W4S is class D , has a cooler sound but very efficient. So if, electricity is a concern...
Underwood had a couple W4S integrated on sale at a deep discount. You would need to check with them

I recently purchased a new Hegel H390 for $4800.00. It is a very good product. Compares very well to the $11k H590, in fact, a lot of the electronics are shared.

Audio Research made some--50 and 75, I believe.  You might want to check them out while seeking one for your system.

Cheers!