me personally I prefer the link building service, this way I know the work gets done if i hire the right person, if I rely on my self the work probably won't get done. but what would be your preference as far as link building goes. I think senukex is good for diversity, but heard good things about AMR and it's definitely cheaper than senukex (but AMR only deals with article sites). I don't think you should rely on a link builder 100% because they might only build one type of links, link diversity never effected me but I certainly take it into consideration on every project. Im waiting for a few months before I get senukex, I want to recoup the $145/mo I will be spending on it before I buy it.