Thiel speaker model range

Does anybody have a list of the various speaker models?  I haven't been able to find anything.  For instance it would appear that the CS6 would be better than the CS2.7 but maybe that isn't so.  I am in the market for a Thiel set but don't know what to look for in the used market.  I heard a set of Thiels with YBA preamp and Electrocompaniet amp and they were glorious.  I don't know the Thiel model but they were large.