^those, to an extent atleast.
Part of it is nuthuggery on the internet from people who probably have no experience with either product they are comparing, but since they're online, something like Sundown is the obvious answer. There are still some "mainstream" companies that make nice products and aren't as expensive as some people make them out to be. Neither do they sound as bad as some people act like they do. For example, all you'll hear online is that the L7s sound like *insert supposedly funny comparison to something bad*, when, actually, just like any other sub, when you implement it correctly can sound good and have even been used in SQ winning cars. CVRs are pretty decent at $75 a pop, JL w6s always have been and still are forces to be reckoned with in the SQ world, Alpine Type R's can keep up with SA-12s in the right install.....but none of that is considered because its mainstream.
I definitely respect the underground companies though. I loved my Sundown products and the Customer Service I've gotten with Sundown and DC were top notch. The guys are always very helpful even if the right choice isn't necessarily their product. You get more options in reconing the subs. All of that, in itself, is enough to make some people more drawn to underground companies and you can't blame them for that at all.
The whole arrogant attitude of "my equipment isn't mainstream, so I'm better than you" gets old, though, and, in reality, different products will fit different applications and consumers whether they be made by mainstream or underground companies IMO.
