Lifesagrag, I see one ingrediant you missed in that marinade- about a tablespoon of Liquad Smoke. It just adds a little something to it.

I really haven't found a way to ruin tenderloins yet , well, except for overcooking. I like to experiment and just throw stuff together and marinate. problem is, sometimes I forget what all I used and can't duplicate it again.
One thing that I really like to use as a marinade is something that my mom and dad always used for chicken when I was a kid. It is a mixture of half lemon juice and half soy sauce. Mom always marinated chicken breasts in it for about half a day, and then dad kept basting it on while grilling. I decided to try it with backstraps one time and it was really good on them just like it was the chicken.
Man, I might have to get a few packs out now... this is making me hungry!!