New Affiliate set up

Hi,

If I have posted this in the wrong place I apologise and hopefully the mods will move it.

I run a number of ecommerce stores, I am not going to name them here as I am here for advice not to promote my company. These stores all sell "widgets" but obviously under different trading names.

I am currently setting up an affiliate system for the sites and want peoples opinions as to the best method of the affiliate network set up.

I have come across a program at http://www.affiliateprogramsystem.com/ which would allow a new affiliate to decide between each of the sites. So they could opt to promote all of the sites or only one. The combinations are endless.

Alternatively would I be better giving each site its own affiliate system.

Both options have their benefits but I would like the view of people who are actual affiliates.

Thanks for any advice

Steve