| Well, if you wanted to upgrade your neg size, you could easily go to an RB or RZ67 for not a lot of money (under $500 for an RB, not a lot more than than for an RZ unless you add certain pricey accessories like the AE prism). If you think you want to go to a bigger negative, I'd try to rent an RB/RZ for a weekend or two before you buy, so that you can get a feel for the system and see if you wouldn't really rather stick to the 645. |