I completely agree with Photon. I'm a huge Rega fan, but completely disagree with Roy Gandy.
I waited a while before I bought a record cleaning machine. Had I known then what I know now, I'd have bought it a long tome ago.
I bought a KAB USA EV-1. All the machines reportedly clean to the same degree. The differences are convenience features. The EV-1 is basically a Nitty Gritty without an internal vaccum.
With the money you save over Nitty Gritty or VPI, get a steam cleaner. I use an old Technics TT to blast the LP with some steam, scrub with some cleaner, then vaccum with the EV-1.
Everything sounds so much better now. It's like I bought a new TT and cartridge. If you're not vaccuming the stuff off, it's not coming off in my experience.
JR