Yeah, about 1 pound. No big deal...
Yes, I went with the 5.0...I think it is the best option. I ran the ProPedal light, but I did run it. Helps keep the pedal bob in check on moderate pedaling sections. I never touched it once it was dialled in though, like there is no need to crank it up for climbing or opening it fully going down...set Propedal on a couple of clicks, and let the by-pass circuit do its thing...works great, it never spiked on bigger hits and was still nice and plush through the small stuff.
DHX-A...meh....you can't compare it. The coil feel tons better. And for the weight penalty, there is always the TI spring option as well....I never went there, because frankly it did not bother me....but if you want to get back close to stock weight it is good to know that you can have the best of 2 worlds.