I just recently auditioned the 80s and 100s. Both are great speakers. The 80s, to me, sounded warmer, but at some points also seemed sloooowww. The 100s on the other hand, while seemingly more open, with some songs tended towards the bright side. Ultimately, for me, had I the choice between the two I would have taken the 80s, but my room size and amplification has a lot to do with that choice, as it should with you. The bass on both is equal to that of speakers I've since heard in double the price range.
I don't know your musical preferences or financial flexibility, but my strongest recoomendation is to really listen to more speakers, from different manufacturers. Once you've made your choice, go out and listen again! Seriously, by then you'll know what you like and dislike. And if you find you like something more expensive than Paradigms look on the used market and be patient. Good Luck