It's too bad you can't go listen to the Alons. It's always a very good idea to listen to the speaker before purchase for obvious reasons. You really can't get a feel for anything from these threads. One mans cup of tea is another mans poison.
I owned a pair of 2ce sigs for a while and in my room with my electronics, they were as dynamic as anything I'd had up to that point. I have since moved up the Vandy line. Subs will make an improvement to the overall dynamics and bass impact but, as Maxgain says, require a lot of set up. Two of the 2wq's is better than one but placing a single 2wq between the 2's on the back wall works well.
It has been interesting to me how everyone says the Vandy's are laid back, not dynamic or what have you. I have used alot of speakers over 35+ years and I just can't agree with that. Maybe I've been lucky with setup or room but I have found Vandersteen's to be a very rewarding speaker.
Friends have always commented on how natural, transparent and dynamic(of all things) my current system is(3a Sigs and 2Wq's.) But, it may be as I said above, I have a room that suits them.
They do require a LOT of attention to set up and electronics makes a big difference in the end result.