well id get a spyder for about 275, their good guns, usually all metal and will last for years. a 16 oz tank beacause it would last longer 4 about 30-40 $ I would get a revolution VL electronic hopper to insure max feed. I wouldn't really get a barrel, That can be saved for after the purchase of the gun.
That would be $385
I would use the left over 115$ or so to buy more ballz and use the rest 4 a barrel.