If you want to avoid trouble, just play safe. Either get a mainstream joomla designer (recommended) or go with any of the firms below:
adultdesign.com
dickmansdesign.com
fdsign.com
wolume.com
adulttemplatesevolution.com
not saying other companies can't do it, but I'd play safe to save time+money, most designers around here don't have a clue about what are they talking about and they apply to anything and everything. I won't give names, but a couple of them are posting in this thread and even though they delivered the work we hired them for, it took months and they delivered some unusable crap
