I use
Mechbunny on Cosplay-Mate.com
I like the fact you just have to buy it once for 1000$ and can use it on unlimited domain. ElevatedX also look really good but it 150$/month and if you have 2-3 options like Video Transcoder and Affiliate Gallery (FHG) Builder you have a 250$/month bill for 1 paysite. That only 4 month and you have mechbunny paid.
I dont know about the other options but that the thinking I did for those 2.