These are all good choices. Frankly, you can't really go wrong with the Baggs Para Acoustic DI, which you said you already have; it's pretty transparent, has good eq capabilities, handles a variety of different input strengths, runs on batteries or phantom power, solidly built, reasonably priced. The Fishman options are also good, with the more recent editions bearing some additional bells and whistles (including subtle, dialable compression, which can be nice). Baggs has upgraded the PADI as well, although they also still offer the original version.

The newer under-saddle transducers are generally better sounding, and less "quack" prone, than the ones from 20 years ago. If you stumble across some extra cash, you might consider upgrading that as well, as it's likely to make a notable difference in the sound. Also, you might consider one of the end-jack preamps that Fishman, Baggs and others offer, as these can be hard-wired in (without additional cutting of the instrument), and save you the hassle and expense of outboard gear.

If you've got a reasonably well-stocked music shop near you, you may want to talk to them about the options -- the technology has improved in recent years, and it's worth getting acquainted with what's out there. Good luck.