I was just at my LHBS to get the additional specialty grains. Not going back before I brew. I'll see if a friend of mine has some bittering hops like Columbus or Chinook I can use. I don't think I have anything like that at home. Otherwise, I'll use the Simcoe for bittering.
Columbus and Chinook are my personal preference for bittering, but there are plenty of other options too. Nugget, Magnum, Galena will all do a fine job as well.
I can't confirm through my own brewing experience, but the only time I've ever tasted "cat pee" from Simcoe was in an all-Simcoe beer. A common opinion is that using Simcoe as a 60-minute bittering addition is what leads to the whole cat pee thing (I've heard the same about Citra as well). Others have reported using Simcoe at 60 minutes with no pee, so YMMV.
I just know that I haven't had the stones to try Simcoe as a bittering addition, since every beer I've used it in has had at least 20 bucks worth of hops in it and I haven't wanted to risk it. Whatever you end up doing, please keep us posted on your results.