I think of what David Bruehl said in a interview I read a while back "So much of tattooing is about learning what works for you, rather than knowing the one right way to do something. Its easy to get lost in all that, though. No matter how hard one tries, theres not going to be that magic machine or magic pigment thats going to make a person a good tattooist. Thats the result of a lot of hard work and a lot of time spent at the drawing table."
I think there is a lot of hype regarding tattoo artists and their machines. I do know that Tim Hendricks makes a very good quality machine with a great deal of attention paid to detail, however...that doesn't mean its going to work well for you.
I've bought and sold many "top" machines just finding out which ones I like. Thats the key. Maybe it runs GREAT for someone else, or maybe its a simple tuning issue. Good luck!