Hi Kemu,
I'd really like to start with the 500 waves max and see how it goes.
The thing is, the larger the distance between the normal game (200) and the extension provided by wave master, the harder it is to balance towers in a way that doesn't put them off in any of the two game modes.
Let's see how it goes :-) Personally I believe the 500 waves should provide enough endgame content, so I will start with this amount now..
I will definitely conduct another poll after this bugfix release is out!
Cheers
Andy