I think you'll be very happy if you decide to go that route. My router is a different design but uses many components from CNCRouterParts.com. The components work just fine.
Several things about the FLA-100 kit seem appealing. First, it's been built many times before so the little problems that plague all builds have been worked out. Second, you can buy the kit of pre-made parts so that you can concentrate on assembly. I experienced some anxiety cutting my pieces accurately and square. Drilling all the precisely placed holes became very tedious (and was expensive - I bought the $75 guide from 8020). I won't even mention all the tapping that was required.