Since the original poster stated he already has the good Eagle rods, I would say stay with the standard length rods at this point. With a 393, rod angle is probably pretty meaningless since it is a minimal increase in stroke. There seem to be plenty of good pistons available these days to go with the shorter standard rods, so why not go that route?
As far as strokers though, it may or may not be folklore, but without a compelling reason and/or a Dart block, I will stay away from the big 427W stroker in the stock blocks. Plenty of horsepower to be made in the 393 and 408 stokers without the issues.
Man, you guys need to back off on the caffeine a bit. You're wound way too tight.....
Bob