@John
Saw "Sant Tukaram" in my local cinema (they mostly show "repertoire" films), and it was a great experience. But if I'll ever get to see it again... 
The two Ghatak were on VHS (a swiss company, I think Trigon). I borrowed them from my library, and the prints are restored and subtitled (german + french). My library also has cloud-capped star (haven't watched it, yet, because there seems to be a problem with the audio), but the company has released also other Ghatak films on VHS, so maybe I'll catch more. Here's the link: www.trigon-film.org (site also in english!)

@madhuban
Yes, the ranking is in order of preference, so I think Aparajito is better than Pather Panchali.
Great to hear about the Ghatak films restoration! What funding organisation do you exactly work for?

@wpqx
Where did you get to see all those Ray films on DVD/VHS? Didn't know so many were released.