Buy the 60 now. It can work out a couple of different ways:
A) After you own the 60, you'll be happy with it and won't feel the need to own an 85. Unlikely, but possible. I have a Basic 42, and I've been trying to convince myself for over half a year that I "need" a 60. So far, I've met nothing but failure.
B) You'l wait forever waiting for the 85 to come out. All that time, you could have been enjoying your 60. But you aren't, cuz you never bought it. Maybe the 85 will never come out. It's been delayed upteen times already. Buy your 60 now!