Do yourself the favour and upgrade to class 3 weapons, the difference in damage is amazing

and if you run burst lasers you'll still be able to fire for quite a long time. I'd also recommend upgrading your power coupling to max, as it increases your weapons, engine and systems charge and re-charge rate.
Also, at least in theory it seems to be more energy efficient to just strap as many A rated shield boosters to the ship as possible, rather than upgrading to a better shield gen. So get 3 of those while you're at it. And better bulkheads never hurt either, you'll have enough spare mass to go around

If you wanna save on money, cut the thrusters and the life support, they're kinda superfluous.
I got my own Vulture recently and I've had an absolute blast with the sjip, so whatever you dicide to do with it, I'm sure you'll have fun ^_^