My 50's Telecaster and all the Fenders i've ever owned have all been MIM models.  My 50's Telecaster, with some investments over the last few years have turned it into a really nice sounding, looking and playing guitar with tons of vibe.  HOWEVER.....  even though i added a set of brass compensated saddles about a year and a half ago,  i still find it hard to keep this guitars 3 higher strings in "spot-on" tune.  I know theres lots of factors that affect tuning and tuning stability,  but i've done all i can do with the comp. saddles and i even bought a new set of Fender vintage style tuners a few weeks ago and installed them.  
So for me, the next guitar i own whether i buy another Fender or build a custom Tele..... is gonna have a "modern" six saddle bridge similar to an AS Tele.  Starting to not like the vintage 3 saddle bridges now  :?:   But those new AS Telecasters look real sweet to me..... would LOVE a brand new one in Vintage Blonde with a maple neck!  :32: :32: 
FenderBender