I would probably go to a twenty-cent Bic before using any of the carts. I am too cheap to pay $4 a cart to get maybe four shaves out of it.
Trac II. I have used one the last couple of days with some genuine Gillette carts from 1995 I found at a little general store to shave my head with. I have to admit I really like the results and will shave my face with them sometime. The Dorcos from Dollar General are actually pretty good too, but the Gillettes are better.