Tony
If looking at other brands why not Seymour Duncan which HBM used and I believe the SSL-1 have the vintage classic Strat tones reminisent of the CS57/62 types as does Lindy Fralin and Tonerider. Have a listen to the sounds on their sites and it may help you decide.
http://www.seymourduncan.com/products/e ... php?page=4http://www.tonerider.com/pickups/stratpickups.htmlhttp://www.fralinpickups.com/stratstyle.aspI think Tonerider true vintage are well priced and Ecca's did sound good to me before he went onto his mini humbuckers.
In the end it's a matter of personal opinion as tone is very subjective and there are as Alan Bakewell tried to say in good humour many variables including where you play on the neck the woods the strings and Plectrum thickness and how you use a plectrum and the radius and the thumb bouncing off the strings and attack etc.
The 57/62's though were Fenders reverse engineered design from a 63 Strat and I understand that Fender pickups were contantly evolving from late 50's on whith more turns of wire being added and that some were simply hotter by mistake and were the much sort after Texas type for the blues genre which are typified by the now available Texas specials and the like. Its never going to be known exactly how many turns of wire HBMs 343436 had or whether they altered the pole pieces and caused something unique to happen. The thing to look for though is probably something that produces original classic strat bell like clean tones as far as the pickups go and the CS54's are quite good but being slightly lesser in the windings they are not quite as full a sound as the 57/62 if you know what I mean because more windings means more DC resistance and henries and a fuller fatter sounding pickup. The same set of pickups in different guitars may never sound exactly the same either because there are a lot of variables including the height of the PU when installed and the guitar setup and so on. I am very satisfied with my 57 Vintage strat fitted with 57/62's and trying it against my Mex strat fitted with the CS54's which a lot of people at our Hankies club really like the sound of... You may well have to do what we all have done and try several out and see where it gets you.