Since we've heard from Vandy owners but no Alon folks I thought I would chime in. I have auditioned the Vandy 3As but not the signature version. I just purchased the Alon V MkIIs used and I am absolutely delighted. Very open sounding and extremely dynamic. I LOVE these speakers. (BTW, the main difference between the MkIIs and the IIIs is the woofer. You can order the III's woofer from Carl Marchisotto for $100 shipping included and have - in Carl's words - Alon V Mk 2.5s!) The Vandies are fine speakers but too laid back to my ears in my (large) room. The Alons are happiest in medium to largish rooms and play very dynamically and beautifuly powered by my 200 watt ss amp. A couple of caveats: first, all the Alon baffle mid/tweeter line is extremely neutral and revealing. Not etched, not bright, not analytical, but because they do NOT have typical box colorations you WILL truly hear what your upstream electronics and cables sound like. To me this simplifies my upgrade path. To others this is intimidating. Pair the Alons with good components (at leat 200 watt amp)and they will thrill. Second, they also sound their best tri-wired. I picked up used Acarion Black Orpheus cheap and I'm going to audition Coincident wire. If you like the Dahlquists, the bigger Alons carry on in that same family sound. E-mail me off thread and I will give you addy for fella at AA with Alons and DQ-10s if you want a blow by blow comparison. Nothing against Vandies, they are excellent, and IMHO underated. I seriously considered them, but I felt there were fewer limitations with the Alons now and for future upgrade path. A pair of used Vs just sold on here - if you can get used pair you will have an awesome deal.
