Re: Wondering about PG's vs AII Pro's.
Artie, I've had both in the same guitar. PG

and APH

in my Dean Hardtail, PG

and APH

in my double fat strat and APH(b) and PG(b) in my LP Standard.
In my Hardtail, I couldn't get the clarity and sweetness out of the PG that I wanted. It always had a little bit of rawness and grit that wasn't what I was looking for at the time. It definately has that sizzle in the upper mids. I'd actually like to try a PG

in my Lester just for kicks. It ultimately wasn't for me. The APH

just had the clarity and suprisingly was louder in the neck position. I had to lower it a bit to balance the volume with the APH(b), and this helped the clarity even more. It was what I was looking for in the Hardtail.
In my Lester, the PG(b) had a nice bite to it, more bite than the APH(b). It still had that upper midrange sizzle, which in the bridge wasn't nearly as bad as I found it in the neck. However, it really lacked the bass that I was looking for. It had a thinness to it that made the overall sound seem thin. Now, it was much better on lower and mid gain levels than it was with higher gain. The APH was smoother again in this position, and was more balanced. It performed much better under high gain, but didn't have quite enough bite on lower and mid gain settings, ALA AC/DC, ect. Ultimately both of these pups went bye bye and a 59' now finds it's home in the bridge. An APH

is it's mate.
In my double fat strat, the PG and the APH in the neck were really, really close. I didn't notice the upper mids of the PG nearly as much here, but it still lacked a little clarity and sweetness. The PG is just slightly ruder, and doesn't work for the tones that I like.
I love the APH

, and have it in 3 guitars currently. Dean Hardtail, LP Standard and double fat strat. I have the APH(b) in the Dean Hardtail, and the PG's are gone. I still have the PG(b) sitting in a drawer. I like a little more bite and tightness in the bass and crispness in the highs when we are talking about the bridge, and I like the neck to be warm, clear and articulate.
I don't know if any of this helps or not. I play thru a modded Marshall, and I use a fair amount of gain, playing a lot of AC/DC, Free, GNR, VH, STP and a host of other 80's rock and metal.
I'll shut up now.