don_c55,
I have a Dual 1229, a Garrard 301, and am restoring a EMT 927. None of these has any audible rumble or noise. After having several nice belt drive tables (Linn LP12, Ariston rd11, Thorens TD165, and Thorens td 125), none of those could hold the pace, pitch or power of my idler driven tables. The Dual is so quite and the background so black it's incredible. I use a Grace 747 with that table and it's wonderful. The Garrard is a freaking legend and it too is incredible. No table that I know will best the EMT 927, at least not to me.
mjperry, I wouldn't recommend a Rec O Kut as a first venture into idler drive. Try a Thorens td 124, or a Dual 1229, or a Garrard 301, or a 401. If you try a Dual, I recommend replacing their very nice but not so flexible tonearm with a Grace or a SME.
Experiencing a well tuned idler drive table is quite addicting. Unless you're going to venture into five figure turntables, they are really hard to beat.
Norman