Ulti-max from me as well. The ball at box finish has good length and is strong down lane. Very strong. It can easily be drilled and surface preped to handle more oil. Go 1000 on the finish and watch it go.
The Alpha-max for me at box finish still had decent length but over all was just a slower reaction. Even on heavier oil I wasn't a fan. I took mine and added polish to it and liked it better. Worked much better on most THS, but still not nearly as well as the Ultimax. So I then bought another Ultimax to have for a rainy day.
If you want a used Alpha max with less then 10 games let me know.