I have built two red/white decks in the last couple of months. Both of them were fun to play, but the one I am using right now, my Sneak Attack deck is really effective. However, the one I built before, was a lot more fun to play. If you're looking for something that will dominate the board (and have about 350 spare bucks lying around)try this:
Lands (22)
8 Mountains
4 City of Brass
4 Sandstone Needles
2 Remote Farms
2 Crystal Veins
1 Dwarven Ruin
1 Ruins of Trokair
Spells (10)
4 Sneak Attack
4 Enlightened Tutor
2 Gamble
Critters (16)
4 Serra Avatars
4 Bloodshot Cyclops
2 Weatherseed Treefolk
2 Endless Wurms
4 Crater Hellions
Artifacts (12)
2 Marble Diamonds
2 Fire Diamonds
4 Grim Monoliths
4 Phyrexian Colossus
Like I said, this is a deck that people will fear, but it'll cost you a lot of money.
The second deck is a lot more fun to play, and is a lot cheaper. I called it my Angry Angel deck. It was built around Angels, which could be brought out into play early by Urza's Incubators (great card). After I was satisfied that I had enough mana on the board, or if I thought that my opponent(s) had too many creatures, I would cast an Earthquake. The deck was rounded out by Walls of Glare, Shocks, Armageddons, Disenchants, Walls of Swords, and a couple of Radiant's Dragoons. It was a lot of fun to play, especially when I threw down two Serra Advocates followed by a 5/5 Radiant on turn 6, which is pretty fast for a white deck. Thran Dynamoes don't help in this deck. What does help is the depletion lands from Mercadian Masques. Round one, Remote farm. Round two, Plains, tap all mana for an Urza's Incubator. Round three, plains, tap all lands for a Voice of Duty and a Voice of Reason. hehehe.
Power does not corrupt. Power attracts the Corruptable.
-Bene Geserit teaching