Re: wanting a replacement maple neck for my strat...opinions please
Well, you want a 25 1/2" scale neck. 21 or 22 frets won't be a problem, because its not dependant on the size of the neck pocket, just the size of the fretboard.
Most strat necks are either maple with maple, or maple with rosewood, so unless you feel confident venturing out into exotic woods, those are safe bets.
As far as warmoth construction, total vintage, or vintage modern.... The warmoth and vintage modern have a compound radius fretboard, which to most (its subjective, there ARE some people who don't like it) is better. This has to do with how flat or curved the fretboard is.... with the compound radius, its curved near the headstock to make chord work easier, but flat near the pickups to make soloing easier. The total vintage is all one radius, and its a pretty curved one, which to some can make it hard to play bends in solos. The warmoth has a 2 way truss rod, which can bend the neck either way. This could be seen as not nessesary, and many say it drains tone. The vintage modern would be the most like the neck you have now, in terms of the trussrod.
My squier (and most likely yours too) has a 1 and 5/8's inch nut... unless you have problems with catching other notes with one finger on accident, or you just find the fretboard too cramped, i'd suggest sticking with the same measurement.
Back profile is up to you, depending on what you want. Some of the custom options, like the 'wizard' or 'SRV' shapes, you can play on existing guitars (ibanez and SRV signature, respectively). From those, you might be able to decide better what you want.
Your fretwire is i'm GUESSING a 6105. Up to you, but i'd stay away from extremes like 6230 or 6100, unless you're shure thats what you want.
As far as the nut goes... they describe the different ones fairly well on their website... its really up to you. But you want to make sure you have a pro do it for you, because an improperly set up nut can cause lots of problems.
For keyholes, just figure out what kinda tuners you want to use, and specify that. I don't know what type the stock squier ones are, but i'd reccomend getting new ones anyway.
I think that about covers all aspects of it, you might wanna get a 'second opinion' so to speak on some things, just in case. If there's anything i can help clarify, just say the word.
