it does not matter what the DCR value is given on a subwoofer. impedance changes with frequency. a home amplifier will work on car subs just as car amps will work with home subs. just match the impedance value with the output power at that given impedance rating. however given most car amps are of low quality they do tend to work better at lower DCR values. car amps are flawed by their power supplies, they are normally all made the same no matter what company makes them because they all use PWM supplies. audiobahn is not a hi-fi product, however they much like all the other manufacturers pretty much make the same stuff all in china within the same 10 factories. i work for a high end speaker and electronics company and have a background in speaker design and amplifier technoligies. IMO its better to have a high sensitive woofer wtih lots of BL. its a known fact that any woofer can not make high spl's without one of two things. A. long excursion smaller cone or B large cone shorter excursion. its a trade off one must decide depending on the application. its hard to make high spl without a large enclosure because the suspension of the woofer needs to have the correct amount of compliance in the box as its suspesion. problem is speaker manufacturers lie about their theil/small parameters, and publish specs based on one woofer they chose. their tolerances on voice coil placement in the gap is usually poor. these are things that plague a good speaer from a bad one.
if after you read this and don't understand a word i said thats fine becuase i wouldn't expect you to. if i could test every woofer out there i could tell you who is good and who isn't, but i can't. i am forunate enough that i can design a woofer and have it built to my specifications for my particular application. i can however suggest to you a few choices i would pick for an off the shelf woofer that most can afford. Kove, Stryke, Eclipse Ti, Peerless XLS, Dayton titanic, those are some that i would recommend.
if anyone would like some more information i may be able to help you out by choosing some amplifier loosly based on the specs according to what woofers you have or are going to buy. I am by no means an authority on speakers or electronics but since i work in the industry and have a degree in electronics i do have pretty good knowlege of some aspects, and I am a huge music fan so i have had many speakers and amps over the years.
whatever you choose or already own can sound good if its setup properly.