The VS line was sold in Canada, for the simple reason its 200-240v, and the US doesn't use that phase. The VX is still sold in Canada, its 90-264v. The VX line still exists, can be found at NCIX.ca
The VS line was built by ChannelWell, as was the VX550 and the CX series with the exception of the 400w, which is built by seasonic, as is the VX450, so I guess it really depends on your point of view as to what you consider budget or high end, builder class and enthusiast class.
And no, that wasn't the list I was looking at, but the updated list. The eggxpert list is over 5 years old. I did, however do it on my cellphone, and for that I apologize, seems it blurped right past a header and the VS series is listed there as tier3, basically the exact same components as the CX series which is its replacement, supposedly, just as the RM was supposed to replace the TX series, but kinda failed at that.