You guys all make such good points you make me change my mind a lot.
To clarify.
I still like my idea best.
Just as I wrote upthread.
My second favourite option would be Top 20 players get 20 points through 1 point. With no bonuses of any sort.
With that in mind, from the options as they are, I will probably vote for 75/25 and no bonus points.
There. I did it. I'm gonna finish my lunch now.