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Actually, it's a bit like asking "which is your favorite child?"
Over the years, many have made a good argument for the early Mk3 as the best all-round performer, although some might question the handling part of that equation.
Having driven most every variant (and having owned several as well), each has its own endearing qualities...and quirks. There's a certain '72 MkIV that I came to know intimately over the past 20 years; I wish to this day I could have bought it when it became available (I was only the mechanic). But two summers ago, I fell in love with a pristine original '64 that I helped get back on the road after decades of storage. I still miss my long-gone '69 Mk3 and my also-long-gone '74 1500...and -- going back many years -- a friend's '66 Mk2. (Black, red interior, wire wheels...shared by at least half of the brothers in a family of eight, and it survived all of them before finally wearing out and rusting away!)
Basically, I say forget the guides and go with what you like (or what you have in your garage)! /ubbthreads/images/graemlins/driving.gif