I think the key to curing live rock is to rinse it all off and give it a gentle scrub BEFORE putting it in your tank. You're trying to get rid of all the crap that's coming off anyway, and that detritus is just going to smell (ugh) if it sits in your tank for the curing process.
I think euroreef's are the easiest to use, but I think a good beckett pulls out more junk. I have a MRC-1 and love it. I think PM also makes a good beckett skimmer.
I'd upgrade/add a pump. On a 240 you could run an Amp Master 3000 and the two iwakis and I think that'd be a lot closer to good flow than what you've got now. A lot of how much flow you want depends on whether you're going bb or dsb. If you're going with a dsb, then that limits the maximum...
