Thanks guys - I ended up buying a set of Ronal LZ's in 16" (since I already have a set of nearly fresh Bridgestone 16" rubber that I didn't want to go to waste). I really wanted to get either ASA LS5's or Kosei K1 Racing, but neither were readily available. The Ronal LZ doesn't look as nice in my opinion, but they'll do as I'll be using them year-round. And they're only 17 lbs. each in the 16" size.
As for my damaged ROH Astron (Antron?), I'm going to take it to Carcone's when I have some time and see if they can repair the crack. If they can, I'll post the set up for sale.