If you want noiseless, then the stack and hot rails combination will be pretty good, but it won't be a real "twangy" combination. Certainly not spectacular. I do like the hot rails pickups quite a lot, though. If you want something a little more tele-ish, Joe Barden is making pickups again. They are a bit hotter than is normal on a tele, and they are of course humbuckers so they aren't quite as clear as single coils, but they are damn close, and they a quiet. As far as I'm concerned, if Danny Gatton likes them, then they are good pickups for a Tele. You might also check out Kinnmans, which are very much like the Fender Noiseless pickups, but they don't suck. If you don't mind the noise, then check out Lindy Fralin pickups (killer, though he is better known for Strat pickups), or Lolar pickups (he does all kinds of pickups, with his P-90s being his best known, but he does really nice tele's too).
As for common Tele mods, the most common ones are a 1 meg volume pot (for that country style, rip your face off treble), a 4 way switch (for series/parallel options), and a no load pot. Oh, and of course changing out pickups, with Barden's being the cream of the crop for most guys. As for the cap, I'd just stick with the .022μf, but that's just me. Of course, the other real popular one is to add a middle pickup, but I really don't like that much on a Tele, personally.
Oh, and if you really want the twang, look into either
the Joe Barden or the Wilkinson replacement bridges (or at least the saddles). They are brass barrel saddles (which are even close to 98% responsible for the sound, but then I've been known to use some colorful hyperbole from time to time, so I won't judge), but they allow for intonation which is anywhere from a lot closer to dead on the money. Great inventions, for a Tele.
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