Hi Speakerfreak,
Paradigm's Monitor series is quite good; I think you'd find the M80s a bit more neutral and natural, with smoother more extended bass. Paradigm's floorstanding speakers typically have a bit of a hump in 100 Hz to 200-Hz region to "goose" the bass so it will be apparent to shopppers in retail stores. I don't care for that much and once said as much to Paradigm's designer, who replied, "Yeah, I know, but the dealers love it." (I'd told him that if he just got rid of the fat hump in the bass, it would be a really excellent speaker; this was after some double-blind tests when I was editor of a Canadian magazine.)
Anyway, the M80s are very similar to Paradigm's Studio series.
Now, Klipsch. I've never liked any Klipsch speakers because they use horn-loading on the tweeters, which of course increases the efficiency and SPL output, but also makes strings, vocals and other upper midrange stuff somewhat harsh and aggressive. I suspect you'd notice quite a difference between the Klipsch and Axiom's M80.
Regards,
Alan
