I haven't heard the pl-200, but I did compare the f12 and 505 when I was looking for a sub. For my budget and tastes the 505 was the winner when it came to music that i like (electronic based music mostly, some 60's-90's pop rock stuff too). For movies they both performed pretty much equally. I run dual 505's and love it and absolutely recommend them to anyone looking for a decent budget sub.
Note- I didn't intend to run duals, but some months after i purchased my 505 from the egg, I found a new in box 505 on local craigslist for less then a benjamin, so I jumped all over it. If one has it in their budget to buy dual 505's new (even on sale from the egg) I recommend stepping up to a single better quality higher end sub, hsu, rythmik, svs, etc.
I don't need snobs to tell me how to think, thank you!