I was using a Sonata3 on a vintage Rega Planar 3 / RB300 tonearm for a while. Really bad match.
For starters, the EM hum from the motor (despite using upgraded motor and decoupled power supply NEO PSU) is so loud, there is no point really talking about “sound quality”. But there’s more:
Rega decks make it hard to adjust azimuth and VTA, which are obviously crucial to sound. Rega are in this way like Apple, I suppose. If you only use their own carts, they probably sound quite good, but you’re stuck with their own forever.
So I sold the Rega gear and got a Technics SL-1500C. Why did I not do it sooner! This deck is dead silent, no motor hum. Also, it’s direct drive, so very easy to use, no more lifting the whole platter to change speed.
In addition, it allows for easy adjustment to tonearm height, so you can really dial in VTA.
The removable headshell (I actually upgraded to Le Son Voyager) is a breath of fresh air of usability. Azimuth is now fully dialed in.
The Sonata3 really plays beautifully now. I can’t speak highly enough of this combination, while feeling regret of all these years I spent faffing around with the dumb Rega. What a crap design, hard to use and almost impossible to dial in. There, I said it! Speaking of usability, I haven’t mentioned end of side auto lift! Another simple feature of great importance imo, especially if you’re running an expensive cart like the Sonata3, which as I said is a beautiful musical instrument.
I couldn’t be happier
Hope this helps.