How do you attract an keep quality affiliates?

Hi Guys,

Next month I will be launching a new site and I hope to have affiliate marketing as one of my major marketing strategies.

If you need any background info the site is a marketplace and takes a commision on sales. I am happy to offer affiliates up to 90% of any commisions earnt but I would prefer to keep the commision payout as low as possible. However I realised great affiliates deserve great rewards.

So my question is how do I find great affiliates. Should I use an affiliate service such as CJ or clickbank??

As affiliates what do you look for how would you get recruited?

Any advice will be greatly appreciated.

Thanks