Skip the 797 and 798. 5" screen just ain't enough. Current production, 898 is miniumum I'd go with. Value can be had in the 997 as a used unit to save some bucks, get the big screen and still have all the current functionality including down imaging, but you'll give up the ethernet port/video out for future expansion options when they become available. No biggee to me though.

Wannabe...