Oh lord no Joe, I don't believe the hype about SX fretted basses, even the SX guys hate SX fretless basses. No way am I taking the SX plunge.
If you want to read more about the Squier VM fretless jazz, find the most disappointing bass I have ever played thread. The last time I checked the thread (quite a while ago admittedly) the Squier VM fretless seemed to be the most disappointing bass. Go to your local shop, before you even play it run your fingers along the board, you will feel a pronounced fret with each line.
I'd like to believe there are decent ones out there though, I just have yet to see a single one. I do keep looking though, just like those "better than MIA Squiers" and "perfect 34 scale B strings" that seem to be more elusive than a white unicorn.
If you do go for the Squier, play it first, not everybody hates them. I got mine from MF and I am in Canada so it wasn't worth the hassle or money to return it. It was the first bass I bought based solely on reviews, I will never do that again. (Even though this other vintage one look appealing)