I've not tried one either but I just gotta be biased and stick with Kale's antenna, the man is human gold. I'm not saying everything else is poo but in my opinion it is, I know it's not but my opinion is the Predator is the best. I'll certainly put his customer service up against anyone else in the business.
BUT... the Stryker antenna's are good. Like I said, I like the way the SR-10mm lights up, cool novelty. The SR-A10 that looks similar to a Wilson trucker, that's a pretty good antenna too but I don't believe it has the novelty lighting inside it (it might, beats me).
The SR-5K which I think is being phased out, looks just like every other Wilson mag mount that's ever been made... probably a good antenna too. And the SR-2K which looks exactly like a Wilson trucker, that's most likely a good antenna also... and they're more than likely all cheaper than the Wilson antennas.
Cobra makes one that looks like a Wilson trucker, the HGA7000. I've sold a bunch of those things and tuned a bunch of them, for the money, I'd buy that before the Wilson.