We try to help out the "newb's" as much as possible here.
Unfortunately there are literaly thousands of amps made that would do the job just fine. You may find a great deal on your future sub/s and this alone may limit your choices when impedence matching.
Other than that you need to let us know where you will be purchasing the amp (retail store may limit brands to what is in your surroundings, or are you internet shopping as well and soes it need to be an authorized place?).
Space may be limited so what are the physical dimensions you're working with? And after all that and you know how much power you need you'll have to set a price point.