...my other car runs low elevens and turns 1.6 60's without tubes or screws. My tires have moved aout an inch on the rims over the course of about six months of running. I'm running tube-type MT Sportsman Pros without tubes, and they lose about a pound of pressure every month, which is basically nothing. I'd try the ET Streets without tubes or screws first because
1) the tubes will cost you about $100 2) the screws are a real pain to install