Since the engines will be thoroughly working on a position, I do not want to leave the positions they choose up to chance. I would like them to work on possibly the most popular openings. Sicilians, Queen Gambits, etc.
Help me decide on 15 openings for my Rybka vs Houdini tournament

I want to see if the Caro-Kan is as bad as I think it is...
Of course also the Sicilian
Open, Closed, Grand Prix and Bb5 lines
French: Advance, Exchange, King's Indian Attack 3. Nc3 & 3. Nd2
Center Counter 2. Qxd5 and 2. Nf6
Pirc (Austrian, Classical & 150 Attack
QGA!
QGD Tarrasch, Tartakower & Exch Var.
That's already over 15 and I haven't got to the Dutch & Ruy!

How about you throw in a couple of the controversial "all purpose systems" (hippo, KIA, Colle-Zukertort) to see how they hold up?
Otherwise, put my votes in for the Bird, Dutch, Benoni, Sicilian, QID, Vienna Gambit, Scandinavian (2. exd5 Nf6), and Bishop's Opening.
Kings gambit accepted
Kings gambit declined
Queens gambit accepted
Queens gambit declined
Evans Gambit
Ruy lopez
Evans gambit
Sicilian
Scandinavian Defense
Scotch game
French Defense

Ruy Lopez, Italian Game, Queen's gambit declined, Nimzo-Indian Defence, King's Indian Defence, King's Indian Attack, Sicilian defence (najdorf), Sicilian defence (sozin), Caro-kann defence exchange, caro-kann advance variation, french exchange, french advance, English opening, Grunfeld defence.
They are some, but not all of the highly popular grandmaster openings.
Also, I strongly reccomend you do not pick the king's gambit. It will just make white lose everytime against a 3000+ rated opponent.

Read, then digest:
http://dictionary.reference.com/browse/tournament
p.s. Although, "match" may have been a slightly better word.

I recommend trying a couple of very closed openings because computers typically do not understand those positions very well, and it would be interesting to see how they play them against each other. The classical KID with 9.Ne1 and some lines in the French come to mind.

So far I have:
1.e4 = Najdorf, Dragon, Open Sicilian, Ruy Lopez, Italian Game, and French Winawer
1.d4 = QGD, KID, Semi-Slav (Meran), Slav, Grunfeld, Nimzo-Indian
1.c4 = 1.c4 Nf6...
1.Nf3 = 1.Nf3 Nf6 2.c4 g6...
So I just need one more opening. Ideas?

Bird's Opening - From Gambit 1.f4 e5 2.fe4 d6 3.ed6
FD - Winawer Var 4.a3
Kings Gambit Declined, Falkbeer Counter-Gambit
NID - Classical Var - Zurich Var 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 Nc6
NID - Saemisch Var - 4.a3
QGD - Albin Counter Gambit
RL, Closed Variation - 6.Qe2 Worral Attack
RL, Open Variation with 9.Qe2 Howell Attack
EO - 1.c4 c5 2.Nc3 Nf6 3.g3 d5
EO - 1.c4 c5 2.Nc3 Nf6 3.Nf3 d5
When my 100-game match between Rybka and Houdini is over, I want to run another tournament between them. This time, however, I want each engine to have 12 hours to complete their moves, making each game potentially 24 hours long. I will make this a 30-round tournament. I want each engine to play the White and Black sides of the same opening, up to move 12. So, I need 15 openings for these two to bang their heads on. Help me pick them, please.