I personally have a heavier uniform (not sure exactly what weight) for when I'm doing training at the dojo, and a lighter suit for at home. My home one is a white top and black bottoms. The white top keeps me cool, and the black bottoms because i don't want to use white bottoms and get them dirty, as i train outside a lot.
Mostly my home training is kata and drills, so i don't have the need for a more heavyweight uniform to take the stress of contact drills. In the dojo we do a lot of heavy contact especially when Grand Master Walters comes to train us, so i do use a more heavy duty uniform (He has a background in Judo as well as karate so we get thrown around by our suits a fair bit)
For at home training, if you're not going to be being thrown about by your uniform or have much contact to it, i would suggest you get a light set, not the heavy ones. Depends on where your training and how much you're going to be hitting the floor, and how much you sweat on what color.
Hope this is of some use to you
Michael