I have never owned a signature guitar, but there are plenty I've wanted to own a few that I'd still love to own. In the latter category, the PRS DGT is at the top. In the former category, the JEM was one. That said, I've got a PRS Custom and CE-22 Maple top, so my PRS needs are covered. I used to have an RG770 and that covered my Ibanez needs at the time. I've always wanted an Eric Clapton Strat, but my current Strat plays and sounds great (albeit modded). And I love the Morse model, but I want one with a non-locking trem (which they won't do), so it'd be easier to mod the heck out of a Tele or ASAT. That said, I don't think I'd ever build a replica or approximation of a signature guitar. Even as much as I covet the DGT, I'd likely buy a PRS 408 instead.
Anyway, nice guitars folks...and J, I get you on the Pauls. Very few people that play them now do so because of Les, more because of Page, Slash, and the like.