Hello there!
Welcome to the world of buying a Pulse Rifle and the decisions to be made!!
There are several choices out there for a PR replica. One of the first questions you need to answer is "what do I want to do with it"? Do I want to just hang it on a wall and look at it? Do I want to play airsoft with it? Do I want something that makes noises?
Then you need to ask yourself "how much do I want to spend"? You can go as little as a few hundred for a solid resin prop that does nothing and then go all the way up to several thousand for a real steel screen accurate replica.
Then, do I want a finished replica or build one myself. How much effort do I want to put into it?
The quickest and easiest PR yes, would be the Snow Wolf. It's a decent replica with a somewhat functional counter (as long as your firing BB's). It does light up, but doesn't count unless your shooting BB's. The rear of the shroud is squared instead of rounded like the real prop. And the separate mag base like you mentioned. However, member Noble on here sells a mag base insert that attaches the two. He may be out of them right now, but you may still be able to get one.
For the lowest cost you could build and paint a Spulse rifle made by Spat. It will be solid resin and really looks the part. I would stay away from any other resin PR you may find on EBay for a cheaper price. They are likely poor recasts.
http://www.spatcave.com/spulse.htmThe HCG is a good wall hanger and benefits from having aluminum shrouds and a static light up counter. However they had a lot of quality control issues and many, many were returned for drooping grenade launchers.
http://www.amazon.com/Hollywood-Collect ... roduct_topYou could also then source all your parts for a build yourself version. Tracking down all the parts from various people may take a while and putting them altogether will test your buidology. But it would be something you did yourself.
http://www.therpf.com/f9/real-steel-pul ... ress-9472/So, lots of options out there. What do you want to do?