I bought the RC60i's during a pre-Black Friday deal from NewEgg.com for $69.99. I suggest going to newegg and creating a price alert as they tend to repeat their sales.
I was in the same boat as the OP with having to make a decision between those and the Monoprice ones. I was ecstatic when I discovered the newegg deal since that made the decision for me. I haven't installed them yet but I'm fairly certain that for that price, I won't be disappointed.