Listen Cindyff,
NEVER pay for a monthly service. It's stupid. Irpotect does all those features AND more and it doesn't take any resources out of your box because it compiles directly into Apache as a mod. Takes 3 minutes. It's a little expensive ($500) but beyond worth it.
http://www.digital-concepts.net/cgi-iprotect.html
The guy who wrote it, Chris, is an amazing coder. His site isn't all that fancy, but does the job.
If you have questions, ask me. I don't sell it or barley know the guy, but I just fucking hate those companies that try to sell it as a monthly service so I'll do anything to assist.