From past history, among many, I believe you will find that a full blade 1450 will be too large of a prop to perform properly for most 20 riggers. It is a 50MM diameter prop and you will find that most really good 1450 worked props are reduced to the 45/46MM dia size. That reduces the wheel size but retains the pitch that is desirable for speed.
A 1445 pitched up, a 1450 reduced, and a H-7 are very good starting points. I have had decent success with the 1600 and 1700 series props too. Mark S. is correct, the entire package makes the difference and determines what you end up with.