Ive owned Brutus 1600s and Sundown 1500Ds... The Sundown is the better amp in every area. More power, better sound, better customer service, ability to run lower loads, etc.
The Sundown would take a crap on a Brutus.... But its up to you if you want to spend the money on it. Id say go for it.
We hooked up one of my 1500Ds on my buddies 2 12" Rs @ 1 ohm and it was powering them nicely. Then we strapped 2 at 1 ohm and the amps didnt get warm in the least bit, but after playing around with them for about 15 mins it got really smokey inside that truck... Type R 12s dont like 1,800+rms each on music.
Sundown - 1
Alpine - 0