I'm an owner of a set of Crawlers for roughly 18 months, have occasionally checked and appreciated the forum, and I was motivated to chime in when I read the reply from a fellow Carvin user.
I have a Carvin CT3 (mahogany body & neck, no maple cap) that I've owner for almost 3 years. I was uninspired by the stock Carvin PUP's (no disrespect to Carvin, their PUPs are inexpensive), and eventually upgraded to Crawlers, after a much appreciated dialogue with Tim (Hi Tim!) The BKP's were a different world from the stock PUPs. From that perspective, I agree that replacing your Strat PUPswould be worthwhile, but only assuming that you love that guitar and intend to keep it long-term.
I also understand the "jones" for new gear (I'm thinking about either a new LP or a new Carvin CT6 at the moment - not a very experienced player, and I'm having a difficult time "loving" the Gibson feel on the instruments I've tried so far, by comparison to my Carvin.) An LP, a Strat, or a Carvin are all somewhat different sounds & playing experiences. I have a CS Strat and love it as well, but it does different things from my dual-humbucker guitar.
I concur with my fellow Carvin owner - if you're looking for a first-class piece and like the ability to custom-order to suit your preferences, I would look at the CT series, or try to hunt up one to play, by comparison to the LP. Having said that, the urge to acquire something that says "Gibson" on the headstock is what I'm pondering at the moment.
If I go for another Carvin or standard production Gibbo, the 2nd call will be to Tim. For an LP Historic, I might think twice because of value considerations, but would probably still not be able to resist swapping the PUPs, and you can always put the stock ones back, right?
Brian