What is the diffrerence between the 250II/250III and 250SE? I think i'm after one of these to run my Mordaunt Short MS20i's, i gather that it's a good match. It's a 2xSL1200 and SH-EX1200 setup, so all vinyl really and i've read the PMA-250 series of amps all have good phono stages. The 350 is expensive by comparison and i don't really need that kind of oomph, much as i'd like it! Cheers.