I've owned 2 Talon SS's, still have one. I recently traded the other one on an Air Arms S400E, the older non adjustable power model. This is a .177 and it will launch 16 gr. Eun Jins at almost 900 fps, that's 27 fpe! Much as I like my Talon, I love this 400, it's quiet, powerful, and incredibly accurate. It also has a fantastic trigger. The new ones are supposed to be even quieter, and the adjustment range on the power is crazy, something like 500-1100 fps in .177. I'd highly recommend any of the AA 4XX series, especially for a first PCP. And I wouldn't recommend a Talon for a first PCP. Even though it was my first, and I think they're great little guns, they require a fair amount of tinkering and adjusting to get them dialed in, and you also just about have to have a chronograph to do it. Not familiar with BSA or FX other than by hearsay, but pretty much all I've heard has been good. No experience with the S-16 either, but I've done some research on it, was considering one myself. The consensus is, it's heavy, temperamental, has lots of orings that are prone to leakage, and is pretty expensive for what you get. Nor does it have adjustable power. Unless you just have to have a tactical looking repeater, I'd stay with one of the AA's.
Regarding feeding a PCP, there is another alternative. I fill my guns from an industrial nitrogen cylinder, the one I get is 443 cu. ft. at 4500 psi. I shoot a lot, and I shoot multiple guns, and each cylinder still lasts me 6 months. Cost for gas is about $60 and tank rental is $11 a month. This may not work for everyone, not all gas suppliers handle this particular cylinder, and it may not be the best choice for all guns. Since I started with a Talon, which has a large tank at high pressure, I didn't want to pump. But scuba tanks weren't a good option either. It's a 100 mile round trip to the nearest place I could get one filled, they want $12 a fill, and the Talon would only get 6-8 fills per tank. I've been known to shoot more than that in a day, never mind a weekend or the entire week :-). So the N2 cylinder is the way to go for me. The main down side is lack of portability, but most of my shooting is in my own back yard, and even when I'm away, I pretty much never shoot up an entire tank. I do have a small CF tank, and one of these days I'll set things up so I fill that from the big cylinder, and fill my guns from the CF tank. Just haven't gotten around to it yet. Hope that's some help, and if you have any more questions, you're in the right place :-). Later.
Dave