Never tried the Champagnes, but have tried ESVs, Edicion De Silvios, Habanos, and the Perdomo 2 Limited Editions (current release). The 2s and the Habanos were ok, but really didn't do anything for me.
I really like the Edicion De Silvios though they are way over priced. Also think these in the naturals are considerably better than the maduros. I want to try the cameroons, but have yet to find decent deal. You can get the naturals and maduros from CI's Make Me Offer for 13-15 bucks/stick for the Double Coronas which is still probably a little steep. The smaller vitolas should be less.
So far my favorite Perdomo is the ESV Maestro which has a cameroon wrapper. I like the 'regular' ESVs also, and they are available as 2nds which is nice.