Philly, neck pickup warmth:
I'd say Blackguard is warmer. The Yardbird neck is sweeter and more bell-like. I can even use the YB neck for crunchy rhythm parts if I want, usually I find a neck pickup (tele, strat, humbuckers, whatever) a bit lacking in definition for that sort of thing... The YB neck still sounds like my idea of a tele neck, just more usable.
Having said that, my favourite "middle" tone is the BG Flat 50 neck and bridge together. I don't tend to use middle on my YB set that much - might be that I haven't fiddled with relative heights enough yet though.
Twinfan - that blue beastie is really growing on me. The whole look of the CS shop ones etc didn't grab me at first. And when you started out on the project for this one it was "yeah, each to his own, it'll be lovely I'm sure..."
But a couple of months on, it's looking better and better :D