What affiliate management tool should I use to manage affiliates?

OK, I am going to need a little help because I dont know where to post this question. So if someone needs to bump me to another section, please do so.

Here goes: I run a health business where I buy tangible products from a USA supplier, and distribute them world wide. Our market in Australia enjoys a high enough margin for me to pass about $70 on to any affiliate who promotes my products. I have exclusive rights to the products, so I am not worried about direct competition.

So, we run a Magento based ecommerce website network - which includes 3 ecommerce sites. We also have a blog to generate buzz, a discussion forum for community building. Setting up a YouTube channel, twitter and facebook is coming along nicely.

Now to look at managing affiliates, I have looked into InfusionSoft (bit too powerful, expensive, hard to customize), we have a NetSuite installation now (but dont know how to customize it). So I was looking at buying Post Affiliate Pro http://www.qualityunit.com/postaffiliatepro/ (aff. link) but havent bought it yet.

Main attraction to PAP4 is that I pay a one time fee, its hosted on my server and I can offer affiliates a lifetime commissions guarantee. So my question is this: is there anything out there similar to PAP4 but may be better? ....cannot find any posts on affiliate management software...so direct me to this question if its already a thread somewhere here....

Once I get this setup, I will come back in and offer it to Warrior members first.

thanks

Mark E