I've been looking to acquire a VERR in 7.62x39 myself for some time now.
From what I understand (via the rumor mill at akforum.net), is that there had been a legal dispute between Molot (manufacturer of the VEPR), and Izhmash (holder of the AK-47 patent rights). Izhmash won the lawsuit and has since aquired the Molot factory and production line.
Robinson Armament had been trying to arrange for new shipments, but so far has come up short. Supposedly, new shipments of VEPRs should begin around June (but, we all know how expected delivery dates work). There's also talk of some minor changes, but no details (lighter barrels and a straight cut receiver have been mentioned, but no confirmation).
I would
not purchase any AK platform in 5.45x39. The demand abroad for it is low (the Russians are the only ones who have it in their inventory). When you can find it, it's outrageously priced (I was up at Rileys a couple of weeks ago and they had maybe a dozen dog-earred boxes ridiculously priced).
I have no experience with the Atlantic Arms AKs. As long as the muzzle brake
is permanently attached or threads covered over and bayo lug removed it should be MA legal.
This website has several reviews and comments about the various AKs available.
http://www.ak-47.us/gear/AK47_Review.php
Anyhow... FWIW, my current AK is an Bulgarian Arsenal with milled receiver (couldn't be happier with it). I'd like to acquire at least on more AK, but I'm not counting on owning a VEPR anytime soon. What I'd really like to get into is building my own from a stamped receiver and parts kit.