To run at 1 ohm, you will need 2 D1's.
You could get 2 amps @ 2000 watts RMS now, usually 2000 watts will run you around 200$ so you could get right around your budget.
From the givin options I'd go with the Audiopipe. They have been clamped in the past and will do rated. You will not havin the perfect electrical and after rise you arent going to see 3k all the time out of any amp here. Remember you get what you pay for.
Do you intend on upgrading in the future? Most likely. Money was tight for me so I considered this when choosing. It's easy to just grab another 3k amp later, than havin to replace most of the set up. Plus buying a lot of 1/0 wire gets expensive.