Based on what I've been reading, I perceive that the expensive cleaning machines aren't going to improve upon manually cleaning my records using THE DISC DOCTOR'S brushes and cleaner. If this isn't correct let me know. Manually cleaning and drying can be a pain but I'm just cleaning a couple a time as I bring them out from the archives for a spin.
I probably won't clean all approx. 3,000 lps since I have distilled much of my interests in 70's classic rock music down to a couple hundred CD's (although I've kept the lps for memorabilia and completeness--the Time3 Journey 3cd set was all the Journey I needed on CD but I'm keeping all the lps). I've been buying for the first time many 70's PowerPop lps (PezBand, A's), pre-punk CDs (Stooges, Dictators) and critically praised and influencial punk bands (Adverts, Wire, Television). The PowerPop stuff although hard to find is cheap on lp since most have been forgotten (note: Rino's DIY PowerPop discs are an awesome best of series) but the punk related albums are cheaper on CD and much easier to find. It's amazing how punk lps like Wire's Pink Flag are selling for $25+ on ebay. There seems to be more fans today due to Nirvana than there was then.
I find my early 80's college radio tastes to fill my record collection with tunes that are either only found in vinyl (Lou Miami and the Kosmetics) or the CD's are so limited they are way too hard to find and expensive (Guadalcanal Diary) but then this forum is "70's vinyl" so I'll stop.
The Virgin Guide to 70's Music is educational and a good comparison to allmusic.com, Rolling Stone Record Guide, Mojo's Great Rock Record Guide, MusicHound, etc.