From what I've seen/heard:
Front strut bar: RMM/APC (same bar, different names) and Carbing. All are solid 1pc bars, so there is very little flex at all compared to 3 and 5pc designs..
Rear strut bar: Hypermotive 3pt or C-One/Beatrush. Hypermotive's bar is the only 3pt on the market that is removable. Others bolt directly to the car, requiring you to remove all the trunk plastics if you ever need to remove them. Hypermotive has brackets that attach between the bar and the car so you can easily remove it with just a wrench at any time. C-One/Beatrush (same bar, different names) looks to be the strongest bar, since it's pretty huge.

Very thick bars and large brackets connect it to the car.
Sway bars: Hypermotive Street and Competition. Street just makes the car stiffer on turns, but Comp alters the handling, allowing the car to be more neutral in turns instead of understeering. Whiteline may be another good brand, but nobody I've heard of has their bars. Similar stiffness to Hotchkis' bars.