Yes, check tube condition before buying, and it may be necessary to have the remote, as many projectors will not have onboard controls for setup. The information I've seen about the 1085 says its a good little projector, but I think is an electrostatically focussed projector which is not the best method, electromagnetic focus is more desirable. If you have a digital menu item in the projector for "Focus" then it will be electromagnetic focus of the crt beam, which will provide better definition, and better focus over a longer period of use. Electrostatic focus deteriorates more over time.
It may be that the higher model numbers on those Panasonic projectors just represent refinements that didn't make it to the North American market, if you could see them side by side, you might be able to tell just by looking.
I have some literature on the 1083/1085, but I'm not sure where it is.