Hello all. Looking to get a rear rack. Ignore the crappy previous post I made, please.

I have a road style bike, if that matters, which I don't think it does.

The Topeak Super Tourist DX (no disc breaks and no spring) looks like a nice quality product, but I'm wondering if there are alternatives that will do just as well? This product has the proprietary track that makes MTX compatible backs easy to attach. OK, sounds good, but does that mean if I don't want to buy an MTX bag I'm paying for things I won't use? I like the way it attaches to the bike with the long mounting bracket arms that can be bent and such but I have seen others with this feature. I'm perfectly willing to bungie a bag I currently have, or one of my kayak dry bags on a wet day, etc. Or is the MTX thing such a wonderful feature that I'd fall down and spasm if I didn't get one?