This convolution reverb looks quite promising...

I haven't tried it yet, but LiquidSonics Reverberate looks to be pretty good, and has a good SOS review. Okay it's not free, but if it lives up to its review, it's pretty cheap for what it does. Might be worth a look at, anyway...

Another convolution (partly) reverb which looks worth trying is http://www2.ika.rub.de/HybridReverb2/ - free I think.  I've downloaded it but not got around to trying it.  I think it came second in this year's KvR contest.