I'll take a look at them although I've drifted enough from my Monk roots that I probably won't qualify for many Monk PrCs.
While there are PrCls that do require you to be a Monk, either explicitly ("Prereq: Monk lvl N") or implicitly ("Prereq: Still Mind class feature" or "Purity of Body class feature""*), many "Monk PrCls" don't actually require the PC to be a Monk.
Instead, many just requiring that the PC have IUC and a few other prereqs, like additional Feats, a certain BAB or X ranks in skills. The aforementioned Shou Disciple is one such (don't worry, I haven't forgotten that you don't have the book its in), the Kensai another.
* Which technically leaves it open to any other class with one of those features- of which the Monk is the only one in WotC's product line, AFAIK- but 3rd party publishers may have some lurking out there. Also, with a sufficiently lenient DM, something sufficiently similar could suffice. For example, some classes with Aura powers have abilities similar to Still Mind, and Divine Health is mechanically identical to Purity of Body.
But what course the campaign takes over the next four levels could determine what I build towards, so I'll keep the Monk stuff in mind.
Its always a good idea to try to get a feel for your DM's flow- you may find the campaign itself offers some very appealing options that you couldn't possibly consider until you had been playing the PC for a while. Who knows, perhaps he has some campaign-specific PrCls that will fit your PC to a T, or some event will occur that will drive your PC in a previously unimaginable direction.