The Alpine 200M is woefully underpowered and the Kicker is no longer offered at
Crutchfield - interestingly enough. If you are purchasing from
Crutchfield, they are most often going to suggest only brands that they sell, as they should. Unlike myself or others in this forum, they don't have working knowledge of any but what they sell, and that is less likely to be anywhere near the knowledge base you'll get here. From
Crutchfield, $250 and under, I would get the following - in order of preference:
Though not a fan of the spade connections, good power, subsonic filter
Mono subwoofer amplifier 600 watts RMS x 1 at 2 ohms
As already discussed, good power, and the same brand as the sub, but DOESN'T have a subsonic filter which I think makes a difference in your configuration, it's still a good product.
S-Series mono subwoofer amplifier — 600 watts RMS x 1 at 2 ohms
Decent power and because it looks cool, no subsonic filter
Reference Series mono subwoofer amplifier — 600 watts RMS x 1 at 2 ohms
Another Harmon industry production:
Mono subwoofer amplifier — 600 watts RMS x 1 at 2 ohms
Now, the other options that are similar in size and performance are under $250 that I would prefer over any of the afore mentioned:
Power, features (subsonic filter) build design, price
More than you'll ever need, extra should you decide to upgrade sub someday, and because it packs 500 extra (can't ever have too much, relatively speakering) watts into a small package for only $20 more than the next choice
Amazon product ASIN B0BN2BG2M1
Next:
Power, features (subsonic filter) build design, price
Amazon product ASIN B0BN25MG9N
Next:
Just enough power, features (subsonic filter) build design, price
Amazon product ASIN B0BMVXC6HZ
My, well, your 2 cents...