If you're trying to get in to expandable arrays, the Versarray is probably a better starting point than the VRX. This is hard for me to say, as I went the VRX route!
The VRX are a fixed curvature 'linear array,' -- if you are trying to use multiple cabinets to shape the wavefront for long throw to the back of the house, VRX aren't going to work. If you want to be angle a ribbon of speakers just right for coverage in your venue, the VRX aren't going to work.
The Peaveys are cheaper, too... I kindof wish I had gone that route. I settled on VRX because I like JBL, because I got a good deal on an all Harmon setup (amps, processors, cabinets), and because the companies around here also have VRX, and we exchange so frequently we don't even bother invoicing anymore.
I am about ready for a 'real' line array, though, and the Versarray might just be it.
Thinks I like about the VRX? Very simple deployment in a lot of configurations. Multiple pipe pockets for different angles on a stand. Setup with an upward curving ribbon for stadium seating coverage from a ground stack has proved more useful than I imagined it'd be. They sound great.