My friend once bought a new bowl and it was too big to fit, so no you should probably bring your bong into the shop and test a few out.
I dunno about fancy bowls or anything, if i were buying a new bowl just look for a nice decent size, and pretty colors:stoned:
I've seen a few with screens but that never appealed to me, part of the coolness of the bong was always how easy it was to clear, at least for me

cleaning, rubbing alcohal and salt, http://http://www.youtube.com/watch?v=9UXz88oQTic

Money isnt too big of a problem as this is something I value very very highly and want the best quality, so let me know.
gooooooooood thankin