Between Nerf Super Squirter and most of those odd brands, I'd probably go with the odd brand simply because most of them actually use pressure in some way. Though to be honest, besides Water Warriors, I haven't really seen anything else that is that great. What is funny though is that some of my less informed friends have bought PR no-name brand guns and they actually performed better then anything NSS has put out so far! I actually saw the gun he bought at the local hardware store (they have a few seasonal toys), it was $15, so not worth it, but my friends had OK range and probably a 1.5 or 2x output. Not too bad considering the PRV was the trigger valve (if you pumped it too much it would just start shooting!). The NSS guns are made of higher quality plastic, but for power, you can't beet the "No-Name
hardware blaster!"
Most of the shield blasters are a bit too much of a novelty to be very much use. I have used the 1000, 2000, and 3000; only the 3000 is any good. The other two don't have that much power and the shields are so small they are virtually useless. In a soakfest the 3000 can be quite fun though, I did get owned when everyone ganged up on me at MOAB, but I still think I blocked around 1/3 the shots aimed at me. the serface area of the shield is roughly 2 square feet so can be quite useful when 1 on 1. If CPS weren't allowed, I might even consider using it in an urban war, it has pretty good output. The problem is it is better suited for close quarters as the crank mechanism makes it rather inaccurate at range. It isn't that good, but it is definitely the best none SS or WW gun in my arsenal.
One gun I really want to try out is the A.R.M. 4000 XL, there is one at my uncles farm but it is missing the backpack. It is useless without it so I am considering "liberating" it as I'm sure I can find a suitable replacement. As a matter of fact, I am considering "liberating" all the guns from that place, many of them are broken and even the ones that work, I have yet to see anyone use them but me!
You know what we need? A smilie with an Electrostorm! It would dribble from the nozzle a little and then electrocute the guy!