Need some advice, Vincent Audio

I owned a SV-237 integrated for a while and really liked it.  I upgraded to a Simaudio 600i, which is better, but only incrementally and quite a bit more expensive. 

Other integrateds I've owned - Audio Research Vsi-55 (I still own it), Peachtree Nova 300, Peachtree Grand X1, Heed Elixir.  I like the sound of the Vsi-55 a little better than the Vincent, but the Vincent has a lot more power and can hold its own.  The Vincent was better than the others mentioned, although the Peachtree units are both very nice, just not quite as much body as the Vincent.  They were a little rolled off on top like many Class D units. 

The SV-237 responded very well to some better tubes.  I didn't like it at first with the stock tubes (kind of edgy), but it sounded great when I replaced them.  Some of their units have the tubes soldered in (which I think is kind of weird).

The guy I sold it to said he liked the sound better than his McIntosh gear.

i used to own the 236, which i stupidly sold on impulse. really outstanding integrated and a great value at around a grand used-- it was very full bodied but detailed.

I've had the Vincent SP 332 Power Amp for about 2 years and I have been very satisfied. It sounds great in my system and drives my Revel Performa F-206s with ease. In particular the bass performance is notably better than the Parasound amp that it replaced. Another plus is that it is built like a tank.

Don't know if this is still the case but some of their integrated amps a few years ago were re-branded Shengya amps. Shengya is a Chinese company and the same amp under the Shengya name was around 500 bucks and re branded Vincent was 1800. Vincent claimed there were big upgrades once they were called out on it ?? That kind of turned me off from them. That's my recollection at least. I saw a lot of those Shengya amps around when I lived in Shanghai.

Cayin was another one. Chinese Spark MT100 was the same as a Cayin A100T. Great sounding amp and very well made, I had one and a Cayin. Could pick up a new spark in China from a dealer for 800 bucks. Cayin costs 3200. 

Not trying to start a fight and not saying they don't sound good. 

big_greg,
 do recall the brand and model of the tubes you replaced the originals with, in case I want to try them, Thanks