++ on the other Vandersteen suggestions especially if you like the sound signature of your 2Cs. I'm also always in favor of listening to other brands if you have a chance to do so as there are a ton of great speakers out there for the money.
The Treo CT's are a great option. I have had the original Treo's for a number of years now and am regularly amazed at just how great they sound with my system as are all of my friends (who also have some great sounding systems including Vandy Quatro Wood) that have been to my house for music sessions. While I do look at upgrading electronics from time to time I have no desire at all to move away from the Treo's.
Enjoy your search for a new set of speakers.