BT's and DJTT's is what i'm all about?

you'd put your money on it if you were wise my friend.

haha

Do you think there will come a time where we can purchase from lists of songs grouped by which key they fall under?

That would be pretty cool I think.

That my biggest thing with intentionally "mixing in key" I seem to have large gaps in the color wheel to make it effective.

whatta ya got to say?