the shock mounts for the c4s aren't the best ever, but they are fairly lowprofile and do the job - I don't believe that the ats will fit in the c4 shock mounts, they are fixed size and made for 19/20mm mics, but you probably won't need shockmounts that fit the stealth mics as you will be wearing them when you stealth and probably running the c4s or other full body mics when you run open
you will also need an optical cable to go from ua-5 > jb3, mic cables, possibly better windscreens if you are gonna be taping anything outdoors, a gear bag, and you probably want to pick up a clamp (never know when you will need one)
a stand adapter may be needed for the stand you purchase, you can find them at
www.micsupply.coma t-bar is used to mount the shockmounts/mic clips to the stand, the more common ones used are the akg km-235 and the shure a27 about $15/20 and $50/60 respectiveley or there are plenty of other options. if you go the route of the c4s they include a small t-bar which you can use but doesn't offer many options
as far as your mics go - for the ~$300 price range you can go c4/octava mc-012/ nak 300 - which is best seems to be a matter of opinion, all should be fairly easy to find used and will hold a pretty good resale value. i don't have any stealth mics so I can't really comment there, although the AT 853s seem to be pretty popular.