Against a complete unknown, I'd ship it. He can easily think AJ, TT, 99 or an oddly played QQ is good here. He can also have a very unlikely but possible slowplayed KK. We're not in such great shape against his flush draws, but we're still a big favourite and there is a lot already in the pot. A2dd or some other wierd Xd2d is flipping, but again there's enough in the pot we can't fold. Hell, even 34o might fancy its luck. He can have only 15 combos (unless he plays J5/J2/52 and I think we can discount them mostly) which are ahead.

Ship and be done with it I say.