A few that come to mind that I enjoy:
Widow - Best sauce to start on another slope (In my opinion)
Mad Dog 357 - Sweet kicker, one of the hottest made out of peppers and not extract (great line!!)
CaJohn's-Has a great line all together
Satan's Blood - Just Peppers and Hot
Blair's Death Line - Another awesome line
Daves Insanity - Another good starter
Z - Worth trying for the price
Krakatoa - Another good for the price
Hot Sauce Harry's - I have the entire NFL collection (34 bottles all unopen!)
Da Bomb's - Great line - Final Answer is Hot!
Acid Rain - A whole lot of flavor in this line, highly recommended!!
Spontaneous Combustion - Even comes in powder form
Vicious Viper - This will bite you
Habanero 750 - no longer made
Cottonmouth Kiss - Very limited
Ring of Fire - One of my favorite salsa's
Blair's Reserve line - Become really stupid and try something like the 16 million, either sauce or crystals. you will hate yourself for the rest of your life.
I have so much hot sauce it is just retarded. The entire bottom of my fridge is full, I have a shelf full, and a cabinet bursting at the walls full of autographed sauces from my favorite blenders and are collectors items. So I have a bit of a habit here. AND, my wife tolerates it!!