I would recommend getting GOOD belts. I will never buy cheap belts again. The Schroth Enduro belts I have are the most fantastic belts I have ever used. Schroth may be pricey, but they are FIA, and have the most fantastic mechanisims I have seen. My Sparco Circuit seat has to be one of the smallest seats on the market for my skinny arse, and I found it near impossible to do up my Leaf belts. The new belts are a breeze to do up by myself, and the release mechanisim is fantastic - hence why they call it the Enduro belt - they know you're going to be changing drivers. It has little loops in it for hooking up the stretchy tubing to hold the belts out of the way and all.
I am in no way affiliated with Schroth, any of their vendors, nor an advertiser for them. They just make a fantastic product that works.
When putting my racecar back together after working on it, it's always lighter - for some reason I always have parts leftover on the workbench.