Absolutely Best Deck.... good questions.. there are so many.
My choice fall upon this three.
Billy Brake's Synchro Summons (1st Place Winner at YCS Columbus 2011)
Monsters: 23
3 Tour Guide from the Underworld
3 Reborn Tengu
3 Maxx "C"
2 Caius the Shadow Monarch
2 Thunder King Rai-Oh
1 Black Luster Soldier-Envoy of the Beginning
1 Debris Dragon
1 Lonefire Blossom
1 Spore
1 Glow-Up Bulb
1 Dandylion
1 Sangan
1 Spirit Reaper
1 Effect Veiler
1 Gorz, the Emissary of Darkness
Spells: 13
2 Mystical Space Typhoon
2 Enemy Controller
1 Book of Moon
1 Scapegoat
1 Dark Hole
1 Heavy Storm
1 Mind Control
1 Monster Reborn
1 One for One
1 Foolish Burial
1 Pot of Avarice
Traps:5
2 Solemn Warning
1 Solemn Judgment
1 Torrential Tribute
1 Trap Dustshoot
Extra Deck: 15
1 Brionac, Dragon of the Ice Barrier
1 Orient Dragon
1 Number 17: Leviathan Dragon
1 Formula Synchron
1 Stardust Dragon
1 Leviair the Sea Dragon
1 Ally of Justice Catastor
1 Scrap Dragon
1 T.G. Hyper Librarian
1 Steelswarm Roach
1 Number 39: Utopia
1 Armory Arm
1 Black Rose Dragon
1 Ancient Fairy Dragon
1 Trishula, Dragon of the Ice Barrier
Side Deck: 15
1 D.D. Crow
1 Thunder King Rai-Oh
1 Doomcaliber Knight
2 Gemini Imps
2 Dimensional Prison
2 Debunk
2 Shadow-Imprisoning Mirror
1 Dust Tornado
1 Mystical Space Typhoon
2 Leeching the Light
Deck: Machina Gadgets
Monsters: 17
3 Machina Fortress
3 Machina Gearframe
1 Machina Force
2 Green Gadget
2 Yellow Gadget
2 Red Gadget
2 Effect Veiler
1 Neo-Spacian Grand Mole
1 Gorz The Emissary of Darkness
Spells: 14
3 Pot of Duality
3 Mystical Space Typhoon
2 Creature Swap
1 Dark Hole
1 Mind Control
1 Monster Reborn
1 Book of Moon
1 Pot of Avarice
1 Limiter Removal
Traps: 10
2 Dimensional Prison
2 Solemn Warning
1 Solemn Judgment
1 Compulsory Evacuation Device
1 Bottomless Trap Hole
1 Mirror Force
1 Torrential Tribute
1 Trap Dustshoot
Extra Deck:15
1 Magical Android
1 Ally of Justice Catastor
1 Brionac, Dragon of the Ice Barrier
1 Orient Dragon
1 Black Rose Dragon
1 Scrap Dragon
1 Thought Ruler Archfiend
1 Colossal Fighter
1 Stardust Dragon
1 Trishula, Dragon of the Ice Barrier
2 Chimeratech Fortress Dragon
2 Number 39: Utopia
1 Steelswarm Roach
Side Deck:15
2 Cyber Dragon
2 Kinetic Soldier
2 Thunder King Rai-Oh
2 Leeching the Light
1 Heavy Storm
2 Dimensional Fissure
1 Starlight Road
1 Bottomless Trap Hole
2 Shadow Imprisoning Mirror
Angel Flore's Deck (1st place YCS 2011 Anaheim) Pre-September/anti-six samurai)
Monsters: 16
1 Elemental Hero Stratos
3 Elemental Hero Alius
2 Thunder King Rai-Oh
2 Cyber Dragon
2 Fossil Dyna Pachycephalo
1 Genex Ally Duradark
1 D.D. Warrior Lady
1 Gorz the Emissary of Darkness
1 Blackwing - Gale the Whirlwind
1 Neo-Spacian Grand Mole
1 Honest
Spells: 15
1 Dark Hole
1 Nobleman of Crossout
2 Mystical Space Typhoon
1 Reinforcement of the Army
1 Monster Reborn
1 E - Emergency Call
3 Gemini Spark
2 Forbidden Chalice
3 Pot of Duality
Traps: 10
1 Hero Blast
1 Torrential Tribute
2 Bottomless Trap Hole
1 Solemn Judgment
1 Seven Tools of the Bandit
2 Solemn Warning
2 Dimensional Prison
Side Deck: 15
1 Mind Crush
1 Nobleman of Crossout
2 Miracle Fusion
2 Penguin Soldier
2 Kinetic Soldier
2 Summon Limit
2 Super Polymerization
2 Pulling the Rug
1 Royal Oppression