Honestly, I've thought about them.
The thing is, I think they might be a bit more mild than I'm looking for in the area of spring rates (though it's almost impossible to know since they don't disclose their rates

). Also, they are non-adjustable in the damping dept, which is something that I'd like to have the ability to do if I'm going to fork over more than $1K for my suspension...It's not that H&R doesn't make quality products - I've used their stuff before and been rather pleased - it's just that I don't know that they're going to fit my needs as well as the MS coilovers.
It's always irked me a little bit that H&R refuses to disclose the spring rates of their various setups. I know that exact rates haven't been published for the MS Coilovers either, but at least they say that they're "approximately double" the stock rates, which is better than no info at all...