since i cant seem to find any fx25's and the fx25b's are alot cheaper, would the b be a good alternative for a similar sound? anybody use them? got clips, thanks?
Yes, although there was a transitional period where the DC jack was a 1/8" female (like a headphone jack on an iPod), and in that period the ideal power it was designed for was 10V, but they'd run fine on 9V. The later ones have the "normal" Boss type plug and are meant for 9V.
Be patient- if you really want one of the older ones, they seem to come in waves; I've seen the market where there's a ton of non-B models when I was actually after a b(my pref). They're out there.