I am in the market for an analog handheld, for it's portability. I have been looking at the PSR-700 and the PSR-310. I can not see very much difference in the two. Price, roughly the same, and so on and so forth. As far as ease of programming; that won't be an issue for me, in the event that one is easier than the other. Do any of you own both of these? If so, what are the differences that I should be looking at? Any thoughts or preferences would be appreciated. Thanks.