Well I have used the Tufo tubular clinchers in the past ......the 23mm elite model goes to 220 psi (I used it at 160 psi) and I prefer them to regular clinchers. You can also ride them if they flat. sealant works well.

I am also planning on switching over to straight tubulars for street use. No biggie carrying that extra tubular just strap it underneath your seat. Using the tape is easier than changing a clincher.

If you are going to try the Tufo tubular clinchers I wouldn't mess with the lower end models unless you like really narrow tires (s33 comes in 21mm only). To me the elite in 23mm is a much better tire.