I don't know Sdcampbell, have you ever heard a Scheu and compared it to other TT's? There's a definite performance reason why the founders of Teres, Redpoint, Gablier, and a few other cutting edge turntable companies originally set out together to copy and improve on the Scheu Premier instead of the myriad of other tables and design philosphies available at the time.
The Premier mkII is absolutley fantastic(I've got two - 50mm & 80mm platters) and can hold it's own against many more expensive and popular tables. Partnered with the right arm and cart, it is capable of superb music.
Obviously, the Denon DL-103, SME , and Linto have all earned "classic" status for their performance.
Before assuming the table's the weak link, it would be nice to know what Ad feels is missing or wrong with the sound of his vinyl setup. Next, how much experimentation has he done with cart/arm setup?
If it is simply a matter of wanting to try something new, I would suggest demo'ing a new phono preamp. It is the easiest(and quickest) of all the components to swap in and out for comparison without excessive fine tuning.
If his system sound is not rich or textured enough, demo a tubed phono. Comparably priced and first on my list would be the new Eastern Minimax. Great reviews and it definetly will sound different than the Linto. There are also some used Art Audio Vinyl One's available here whose reputation speak for themselves.
For less money start with the EAR 834P(especially the mod'd version), wasn't my cup o' tea, but there are lots of diehard owners and great reviews.
On the solid state side, the Tom Evans gear jumps to the front of the line. I think Ad was considering one a while years back.
But, first let's find out what he feels is missing or lacking.