2 250's in the rear and 400 in the center. I have the same boat. Actually getting the full 400 in the center bag has been debated though. What ever it is, it isn't quite enough.... lol..
I have an early production 04 VLX (it has a bag, not hard tank in the ski locker), and our local certified scale shows about 380lbs when full....I have not weighed the rear tanks.
Greg, and correct me if I am wrong but you probably got it a completley full when weighing it, but in the boat it never quite fills up all the way, so it is even less that 380 when in the boat.