If you're talking about the old Rondines, the K33s, the B12s and so forth, yes- they're nice. Very heavy flywheel to eliminate the effect of the puck drive, nice stable speed. Along the same lines would be the Garrard 301 and 401. Another consideration would have been the original AR turntable or an Empire 698 / Troubador. All massive beasts. If I were to go in that direction, I'd like to couple it with an SME tonearm.
(On the side: If I could get an original R-O-K cutting lathe to go with it...)
The only "modern" R-O-K that's worth mentioning is the new Rondine III or the Trovatore.
http://esotericsound.com/turntableA.htm
I guess you're asking because you saw the R-O-K logo on the cheap POS I have. Piepan platter, crummy tonearm, direct drive, and wildly prone to acoustic feedback. It's absolute junk. I bought it mainly because of the collection of shellac 78s that I have, not many others have 78 speed. I was considering a Dual 1229 which had a heavy platter and puck drive, but I don't like the headshell.
Money, money, money... Trying to scrape money together to build a pair of Klipsch knockoffs.