Which device has the best chance for overunity success???

[FatChance!!!]

I just keep wondering about different self-sustaining OU approaches and finally I had to ask the question.
Which device do you think have the best chance for Overunity if properly designed? And why, if I may ask.

1. The Hilden-Brand motor.
2. The Bedini Circuit.
3. The Magnetic Wankel motor, aka Sprains type.
4. The MEG.
5. Overunity Electrolysis (Electricity generated from the hydrogen will run the Electrolysis in closed loop).
6. The Steorn solution (Whatever this turns out to be).
7. The TPU of Steven Mark.
8. Cold_Fusion, Self Sustained.
9. The Flynn motor.
10. Paul Lowrance diode claims.
11. Or maybe some other device not being in this list.

If any of these tech mentioned is considered being Crackpot technology, then please point it out.

[FreeEnergy]

http://www.youtube.com/watch?v=4CWIUjHl1F4

[onthecuttingedge2005]

currently, only nuclear holds the record. fusion detonation, 30,000 times more energy than what it took to make the reaction and materials. beat that.

[FatChance!!!]

http://www.youtube.com/watch?v=4CWIUjHl1F4

When will the update on your progress come?

[FreeEnergy]

When will the update on your progress come?

this is not my work.
just a video which i think has a chance to achieve over unity.
enjoy!

p.s.
this is also not my work but is interesting: http://www.youtube.com/watch?v=Cq5r08eqgsk from thread http://www.overunity.com/index.php?topic=8051.0
this also shows potential.