DreamTorch (v3.0.5) is the best I've seen/used if you're looking for accuracy. Definitely worth $2.99 in my opinion.
($5.99 is a little steep...)
HedoneDesign just cam out with an "OS6-like" theme too. Regular $6.99 (ouch) but on sale at least for today for $3.49.
Looks nice from screenshots.
I've tried both of these. Gotta say DreamTorch is the best thing out there, very much like OS6! Takes some getting used to but I'm loving it. And I haven't been experiencing the lag that many others have mentioned.