Two things to pay attention to with shallow subs, do they still require a standard box size (and do you care), and excursion. Most are only good for midbass duty because they don't ahve the excursion to pull off low frequencies well. For example, that kicker has 4.3mm of excursion...terrible for a subwoofer, somewhat ok for midbass. In the shallow categories only a few stand out. Earthquake SWS, MTX Thin, Stereo Integrity, re audio and on the high end scale alpine,JL. Anything ~12mm+ should be ok to amazing for a shallow sub, but it all depends if you are a basshead or not and desired output level. Winisd pro and unibox are good for modeling subwoofers.