Carvin necks are cool, if you are into the slim, flat radius shredder style necks. their pickups are serviceable, but nowhere near as vibey as a good set of Duncans or even Dimarzios.
Sounds like the Carvin neck might be similar to the Ibanez based on Benjy's comments - I have considered Warmouth as well but thought I'd look at Carvin - I know they make quality stuff and have played a few of their quitars but I wasn't sure what you get when you just buy a neck from them.
In terms of pickups I was particularly interested in the Holdsworth Humbucker and the AP 11 single coils - the guitar I'm working on will be a HSS set up.
I definitely love the Duncan sound too, I have a Shecter with actual SD pups on it not the Duncan designed ones and it sounds incredible - I love the jazzy warmth of the neck pickup.
Thanks for all the info so far.
I have a Carvin neck and a have had Carvin pickups. The necks are real nice strong slim profile necks. Almost like a JEM neck but not as wide and with medium profile frets. The Ebony fingerboard is the smoothest thing on the planet and gives a nice pop to notes.
I had a M22SD pickup and two of their stacked single coil pickups. The M22sd is bright and has a real strong attack. Very loud and brash sounding I used it for nearly ten years. I replaced it with a Duncan Distortion which was a world of improvement. The stacked single coils were dark and flacid.