Yes, TamAudio is legit, and is a official distributor for matrix gear.
Check out the matrix's actual website under :Contact Us":
I sent an e-mail just now. I just want to be 100% sure that I get the latest version. If this is too much of a headache...I might just go get an Asgard. Is the Asgard as versatile/good sounding as the M-Stage?