You got 6lbs of wheels. They're for jumping and will take a lot of abuse. Your bars won't hold up to much abuse at all. I hardly even see the little guys at the track running alloy bars.

44x16 used to be the standard BMX gearing. Now most bikes run a more compact setup. 45t is considered huge and unneccessary.

I've put in my 9 hours today, I'm off to go work at a bike shop for 3 hours.

Cheers.