I think i'm definitely going with the gun mounted version, just have to decide how much I can spend.... or rather my wife tells me how much I can spend.
The VRL-1 Looks good but I also found these that look promising:
http://www.allpredatorcalls.com/wick...pter-w400sgrn/
These are nice because you can buy a separate handle to use them as a hand held light also.