I want more seasonic in my rig, because currently i have none. I've used a seasonic psu in the past and had no problems with it, and likely would still be using it if I hadn't sold the entire computer it was in.
I already have the x750 and it an an amazing power supply. seasonic is known for their quality. by my experience I am interested in anything seasonic makes. Right now, I would like a more powerful power supply but cant afford it. its the reason I chose a 280x as my next video card. I can crossfire them in the future. If I would have gotten a 290 I wouldnt be able to do that.