The Fluance just isn't a huge upgrade on the uTurn. Everything I've read about the PLX is that it is a step above both and gets you into the realm of the next level of table. Turntables can be a big outlay and I think bang for the buck is important on upgrades.
If I was looking at both new, I'd do the Fluance over the uTurn, but they're in the same space. Bang for the buck would be better to upgrade the cart (the 2m Red isn't that great in my opinion), add an amp/preamp, and upgrade the speakers. Then I'd come around to the turntable if the system is still wanting for something.