Logic's thought is to stay away from the numbers. Go with number 3 if this was me. Have fun, Logic...
I agree 1 or 4. Yes they are kind of long but not too bad. They are specific, dont have hyphens ect and are dot coms so im quite happy with them.
Shorter is better .com over .net capitalize the first letter of each word when you market it so it will stick in the visitors mind. I don't know if bonus chaser are good keywords but the last is the best of the options shown.
Yeah thats the one im siding towards. I will probably develop them all though and link them up. Thanks.