Hi Jules,
IMHO the PCM70 is a classic, hip Lexicon at a moderate price ($700 or so on ebay) that you would get a lot of mileage out of.
I like 'em for echos (6 independant delay lines), major/minor chord resonances, chorus/flange, swirls, plates, verbs, you name it. It's all useful, musical stuff.
Lexicon-wise, we have a 480L, 2 PCM70s and a PCM60. The 480L and 70s get constant use...I don't think I could find a mix recall sheet here that doesn't show both 480L engines and both PCM70s in use.
Also, every now and then, the old PCM60 is just the reverb that rocks when you're struggling. That happened during yesterday's mix...the PCM60 came through for a verb when the 480, Orville, H3000, Yardstick, PCM70, Rev1 and SPX90 weren't cutting it.
The one Lexicon that I don't have but would like to pick up, is a PCM42. Actually, a couple of them (PCM42 sellers, feel free to email me directly).
Jon
P.S. Interesting to see people looking for clear-sounding reverbs. I often find myself rolling OFF the high end on the verb settings.