You have received some great info from Bob, Jim, and Holmz.
I still have my 1C’s, 2C’s, and now Treo’s. All great speakers in their own right. For ‘big sound’ with orchestration, the 2C’s would be better, but, I still listen to my 1C’s in my secondary bedroom system, and they still sound great, even though not optimally set-up.
How much are they being sold for? I got my 1C’s for about $350 which was a steal. If they are closer to $1K used, I would consider used 2’s, but again, depending on cost, the 1’s used can be a great bargain.
As far as foam surrounds, I believe Richard just stated on the Vandy forum the only 1’s with foam surrounds were some of the original 1B’s, thus, all C’s should have rubber surrounds.
As far as a more ‘modern sound’, maybe not if you want absolute clarity and detail, but regardless, to me, Vandy’s just sound ‘right’ to my ears.