Thanks for all the great replies. I'm starting late in the year (as mentioned, end of April) in northern MS so I think I'll miss a lot of the prime time for nectar flow. My primary goal is to build the two colonies to be strong enough to last the winter, though I hope to get at least a bit of honey. Starting late, I figured I'd have to feed a fair amount.
Just kind'a mulling the options over in a rambling fashion while typing here, see if any of it makes sense:
After my first pass through the forums (and elsewhere, both web and a couple of books) on feeders, I had decided the inverted jar was the best route, but then there was info of leaks drowning nearly the entire colony and on second thought decided perhaps that wasn't the best idea (there's also the burr comb issue with the empty super). Next in line were the boardman-style entrance feeder which came with the kit, or to use a different top feeder than the inverted jar. With the fact that robbing a major concern with the entrance feeder, I was leaning toward the top feeder, and was thinking the baggies the best bet so that I could also feed Bee-Pro or some such, with both the Bee-Pro and the baggies on the top cover. I figured I'd build a "shim box" to raise the telescoping top up slightly for clearance. However, the late evening or after dark bag replacement was a concern,
Baggies: After reading the responses, T-Beek indicates that late evening checks are done routinely, so that's not so much a problem. I know me pretty well, though, and if a smoker is needed I'm unlikely to spend thirty minutes lighting a smoker every day so I can spend two minutes changing out the bags (though I'd throw on a veil). The thought of 483 stings after changing out the bags the first time gives me pause on this one.
Top Feeder that was pictured: If I figure a reasonable way to feed the Bee-Pro other than on the inner cover, I could go with the top feeder from Mann Lake purchased complete with the painted super. Seems like a fairly easy option, late evening checks wouldn't uncover the bees, and is probably the top option at present. Plus, one fill-up would last a while and after a couple of checks to see everything was going well I wouldn't be checking daily. It would also allow me to add a second deep brood when needed (my purchased hives are each two deep supers, one medium super, screened bottom) and just move the feeder up. Baggies, though, are the same in that respect.
Inverted jar: Lots of folks still suggest the inverted jar, so I don't know if my whole-jar-leaks scenario is valid or not. Burr comb can be controlled with crumpled newspaper around the jar (so some info suggests), but when I need to add my second deep super if I'm still feeding I would have had to build a box to surround the jar as I only have the two deeps per hive. No major ordeal, though; if I go this route I'll probably build the box to start with.
I think right now I'm leaning toward the Mann Lake feeders, and will figure out another way to feed the Bee Pro.
Thanks again for all the replies.