Chesser, not sure about your v3 but my v4 is in a different class than my decommissioned v2. You would love the 100s. The HP drivers and new tweeters make a big difference and I think big strides were made in the family of curves and crossovers between v3 and v4.
I hear you about the introductory pricing. I look at the price of the active LFR1100 now and I'm so glad I drank that Kool Aid a few weeks back that Ian's been trying to feed me all those years with the passive LFRs.
His generosity also really helps with upgrades.