What M42 adapters allowing infinity focusing?

I'm an unashamed GAS sufferer. I have more than 300 cameras. I shoot them all. I have lots of free time.

For film, I use Spotmatics and M-42 Takumar lenses. I use many of the lenses on my Canon DSLR (5dII). Unfortunately, some of the Takumar lenses will hit the mirror, so they don't work (50MM 1.4, 35MM f2, others). Regardless, I usually shoot in manual mode and the metering with the 5dII works just fine. I just ordered a Canon EOS 3, so we will see if the metering works with that.