SS amp or receiver that sounds like Tube Amp

You might very well get the sound signature you prefer by buying one of the current class D with a tube buffer on the input, giving you a modern solution to the problem. If you prefer vintage electronics, might I suggest a Hafler DH-200. This particular model uses Mosfets in the output stage and there are still many of these left in the used marketplace. Further there a few different resources for 'upgrade kits' that are said to increase sound quality quite a bit. Given how good they are right out of the box, improving on the basic performance would put it in rarified company. 

OP

good for you. your Onkyo TX-2500 MKII has performed admirably to your liking with a "wow" moment. I know the feeling as I was comparing my audio note clone 845 power amp with my Pass Xa-25. very close indeed at average listening level. 

If you are happy with the Onkyo, then stay with it, and save yourself alot of money. Shiit Audio has preamps, power amps that sounds much like a tube sound. I compared, and I stuck with the Primaluna. I read another person liked Hegel better, but I compared my EVO 100 integrated directly against a Hegel 390. The Primaluna was the clear winner for detail, accuracy of instruments. A sax on the 390 did not sound right, wth primaluna was perfect. The 390, which way overpowered the EVO integrated, but just was not realistic in sound as the Primaluna. That's my experience. The 30wpc has no problem driving my speakers which are 89db sensitive, 70wpc rated.

During a component switch from my V-4s to my SMc upgraded 225. . . .there wasn't much difference.

Don't know why you guys are still posting to try to help him out.

He's already declared everyone's advice to be a waste of his time.