I'd consider Visioary balls... for an oil shot, the Immortal solid. Grip and a killer differential to make the ball move desoite high speed/low revs on oily shots. For the dry, a Green/Blue Centaur could be the ticket - very low differential.
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DizzyFugu - Reporting from Germany
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Is he expanding his arsenal or just looking for a new 1-2 combo?  If the former, then the Epic Battle or new Quest would work for the heavier oil, pair it with a Neptune for light oil.  That's a pretty big gap between them, though, so unless he's got other equipment he'll keep to go in there, I think he's going to have a tough time transitioning from the Battle to the Neptune.

If he's just looking for a 1-2 combo, I wouldn't worry too much about getting heavy and a light/dry balls but would look more towards medium-heavy and medium-m/light.  In that case, something like the Mystic and Horizon Pearl (maybe the Neptune) would have a smaller gap but still cover a wide range of conditions.  Or the two Hole Pounders if he's got the right sense of humor.  I hear you can get them at Nationals for $325 for the pair, drilled, inserts, and a 2-ball tote.  Or the two Thunderstrucks Solid and Pearl.

SH

it depends on heavy is heavy and how dry is dry.  i myself like my elite shark (hey it was 50% off) and my track crash.  i am going to try and would recommend a roto neptune
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Go Balls Deep

Lefty

Total NV drilled strong with the cover roughed to 2000 will move on pretty much anything.  Then, the Ice (blue or black) would be good for a medium-medium light-light.
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Matthew R. Adams
Current Line-up:
Ebonite The One
Ebonite Angular One
Ebonite RXS 300
Ebonite Apex Aggression
Hammer Hawg
D/T Vendetta Sniper
Ebonite Maxim

Coming soon:
Hammer No Mercy

Edited on 5/3/2007 1:24 PM

I don't think this is a case of "other people being at work"...it just so happens that the two companies mentioned, Roto and Visionary, have some incredible stuff out right now, for a huge range of conditions and styles of play.  No disrespect to other companies -- I'm sure every company has a few good balls -- but you basically can't go wrong with either of those two.

Now that we know the Black Widow is his "medium" ball, I think I can make some more informed suggestions:

Heavy --

*Particle (for a true flood, when nothing else will move)

Roto Grip Epic Battle (note to Shelley, the Quest comes out in August, so that's a bit of a ways off still)

Visionary AMB Particle

*Reactive (for a heavy pattern that still has some dry boards, etc.)

Roto Grip Epic Odyssey

Light --

Roto Grip Neptune (for a more skid-flip look)

Visionary Green/Blue Centaur (for a smoother, controlled look)

Roto Grip Venus (stronger than the two above, but since the Black Widow -- a pretty strong ball -- is his "medium" ball, it might not be too hard to consider this a possible "dry" ball)

Hope this helps!
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I am the University of Virginia's Bowling Team.  After all, one All-American is all you need.

If he's looking for heavy and light then I would strongly suggest Roto Grip's Epic Battle for the heavy and for the light the Neptune. They won't set him back a fortune either and they last. Plus, you can play with their surfaces as well to add a further adjustment if needed.

Chuck