Try running a really basic adwords campaign with website optimizer to do an a-b split test of the two price points you are debating between.

It will take a little bit of work but if you can get a good feel for which one is better prior to doing your actual launch you'll be able to rest easy with the piece of mind that you are 100% certain that this is the best price point.

Also, you'll be able to use your little experiment's results in your affiliate recruiting by stating that you did an A-B split test of price points and this price is PROVEN to convert xx% better through testing!

Affiliates love knowing that they are promoting the best possible version of your offer.