Not used the Poorboys myself, but have the CG Wheel Guard and think as a one stage product it works great, got a nice cleaning action and seals the wheels well. You can then layer it with a dedicated sealant or a wax. The Poorboys I believe is just a sealant so can be layered - the Wheel Guard cannot as the cleaners will remove the previous layers, or most of at least.
My personal choice is SRP, sealant and 476s. Currently have Jetseal which is excellent, but can't seem to find any for sale at the moment!