JC,
I have the 450v2s. I LOVE the sound and 40 lb weight. I like the design that allows for different configurations on the floor. I've also mounted them a couple times. IMO, much better than PD, L1 and Stagepas, which I have also owned and played live with.
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Live: Korg PA4X/Bose L1 Pro 8/Senn 935
Studio: Korg PA4X/Kawai MP7SE/Tascam DP24SD/Sony C80/AGK 214/ATEM Mini Pro switcher/