Need to cut some 1.5" steel tubing at..

Horizontal Bandsaws will do it, accurately and with a nice cut surface.

I have one at the shop outside of Boulder, but any metal shop will have one and do it.

Sawzall and a grinder will work just fine!

Cut as sharp an angle as possible and finish it up on a decent disc sander.

I just had to something similar with 1" tubing. My cold saw could get me to 37 degrees. After the cut i sanded it down to 35.