Kingman already makes an electronic frame that should go right on your Spyder without a problem. It seems to work as well as any other one.
As far as barrels go, just get one that fits the bore size of the paint you normally use. Expensive does not always mean better. Lapco, Custom Products and J&J all make good barrels for a good price. Boomsticks are nice but with the right paint match are no more accurate than another good quality barrel.