Now that I've had the Monster Cable speaker cables in my system for a bit, I think they're certainly a better fit. There's still a bit of top end to be toned down. The thing with trying speaker wire is that I can't use standard lengths as I need 12' or so at the least. I don't want to just purchase cables and be stuck with them.
Regarding the Sylvanias, Andy had actually recommended them, but I suppose it's worth trying something else. At least he has a return policy with his tubes.