Yeah, I've heard good things about the No-Rez. Looks like it would be a good cost effective upgrade.
I think the wiring that's really tight is the line going up and through the top of the sealed enclosure to the mids and tweeters. I don't know if I would upgrade the wiring as it seems pretty stout to begin with. Crossover component upgrades will be a good thing to invest in.
Danny,
Is it capable to make these speakers bi-wireable? Do the crossovers have to be modified for bi-wire capability?