I have a pair of L12's which handily outperform anything else I've tried and I'd imagine the L22's are essentially the same but "more". I didn't have much luck getting a sense of the difference between the L subs and the F subs from Rythmik when I enquired, so when mine came up in the right finish at the right price I just decided to give them a try - happy I did. I've seen L22's advertised recently and been tempted, but the shipping costs were a bit extreme for the pair so I passed - if they're the same ones you're considering (in FL) and the shipping isn't an issue for you, I think the asking price is very fair.
With my HT setup, I recently added two extra "surplus" subs (four total) and despite only two being the same the difference in overall performance was well worth the experiment. At some point I'll probably get a bit more serious about these, but for now I'm content to enjoy the improvement.
Hope this helps.