Personally I'd suggest going Wizard- 2nd, Fighter- 4th.
You need a +5 BA to qualify for the class, Wizard 2, Fighter 4 gets you a 5.0 BA, whereas a Wizard 1, Fighter 5 gets you a 5.5 BA. That, and remember that Bladesingers have their own spell progession and lists, so your wizard spells and your bladesinger spells are seperate. So a bladesinger may not be able to cast True Strike without researching it, but a wizard can right off the lick.
As for advice on how to build the ultimate bladesinger... I dono. I've never played one. *shrug*
Edit:additional Oh yeah! I'd highly suggest specalizing for your wizard levels, by the way. Either spec: Divination, or spec: Abjuration. Another reason to go F4/W2, is that a F4 has the same number of bonus feats as a F5. You basically trade in some fractional Ba and Hp for more spells.