Alright, i have never thrown Motiv, but heard great things about them.  What would your favorite 2 ball combo be from them.  I want one to start out with and use on fresh to somewhat heavier, but never see super heavy oil.  I do throw about 17-18mph with higher revs, and then one ball to ball down to or use on house shots that will carry when stronger stuff starts pinging 10 pins.

Thanks,

 When my jackal ghost is to much I go to primal fear than cobra and tag if necessary

Come on guys, the OP doesn't see heavy oil.  He also has higher revs and medium-high speed.  Depending on tilt and rotation, I can't see much use of a Ghost, and, to imagine the Chronic as the weakest ball is dangerous.

Go to your pro shop.  Ask them what they would suggest and why.  If he/she doesn't know the Motiv lineup, ask what of their house brand do they suggest and someone can make a Motiv comparison for you. 

I would just hate to see someone get a Ghost or Trident (very good balls) and you be able to use it for less than one game.  I would much rather get something that keeps me in play the longest before switching to something weaker.  How about this, get the Chronic first (great benchmark ball), use it for a couple weeks, then decide what you need after that.  If the Chronic isn't enough, then go stronger.  If it is too much or starts to lose carry at the end of the night, then go weaker.

There are a lot of factors that go into selecting a ball and most of them no one on the internet can decide for you. 

Any ball from the Revolt series. All very good. Venom Shock is an excellent benchmark ball too.