I don't have any experience with the yokohamas so have no opinion on them either way, BUT I would shy away from the falkens.
I had them for about 12k miles, and They are GREAT off road, and hold up well to a beating, and can be aired down pretty low as they have a very strong sidewall, and they didn't chip or chunck or get any cracking or splits of any kind. they looked almost brand new after many off road trips...
BUT, and its a big one. the sipings and grooves only go down half way through the tread, so when you still have half your tread life left, you basically have 5 slick sections:
They get noisy, they start to handle poorly, they loose their off road traction that they had previously. I simply could not recommend them to anyone.
are you thinking of sticking with your stock rims? do you have 17" or 16" rims? spacers?
I have a set of hercules all trac's really like them, but not available in a 17" size. they do sell their terra trac in a 235/65-17 if you have the 17" rim. The yokohamas get great reviews by people and I've seen them driven off road a few times on other 4x4's and they seem to hold up (but don't look as aggressive) so there are other options out there for sure.