Hey,
For heavy oil I have seen the Real Deal and Hawg being thrown by team mates on my college team. Both are very good balls
for Med-heavy to med i would go w/ the Big Rig Diesel (this ball doesn't hook as much as it is advertised to)
on med i would go w/ the doom i have seen and heard many good things from that ball... could also go w/ the one (ebonite owns hammer and this ball is great)
if you do at some point deside to get a dry lane ball...
on dry i would recomend a Switch Blade drilled 1:30 pin above the fingers.
I also absolutly love the PURE hammer (i have the black one)... it is a very different ball (urithain rather than reactive), very very very smooth, but stronger than i expected, good both dull and polished
if you want more info just msg me
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Born a Lefty... Forced to become right handed... i should be able 2 sue the San Francisco public school system