Decent Subwoofer for an Apartment ( concrete floors and walls )

Hey all! I'm moving this discussion over from the PSB speakers thread where I just finished getting help from some VERY knowledgeable folks on set up. I was hoping someone could make some suggestions... Here's the thread I've hijacked and brought over here:


Those seem to be way out of my price range, and probably a little overpowered too. Thanks for the link though I'm only looking at budget subs, and don't really need much past 100 watts I would think. I've done a mind boggling amount of research over the last couple hours ( incidentally an excuse to listen to my newly discovered psb awesomeness )... and have come to this conclusion: I know nothing haha. Perhaps this isn't the best forum for sub discussion, but keeping with the psb theme, I've heard that their subs are good " linear subs " which might, from what I understand, keep the bass for music and HT a little tighter. This tells me it might be better for my medium sized room ( and an apartment I might add ). Beyond that I understand that frequency response down to 20 - 30 hz is coveted. I certainly don't need room shaking sound! I need clear bass to compliment my current system. Further to that, it's my understanding that non ported subs are ideal for music ( though they are more expensive and I'll also use it for home theater ). There are an absolutely dizzying array of manufacturers to choose from, with Dayton's, Bic's, some Energy and to a smaller extent Polk audio being decent budget subs. What I should make clear is that, unlike most other budget sub seekers, I wouldn't want to rate the budget sub being a "good value" on sheer wattage or room shaking noise alone. I'd rather have a less powerful sub with clearer bass response, be it linear, ported or sealed. I'm tempted to stick with psb's for timbre matching, though again this doesn't seem like a priority with subs. The dayton subs are super cheap and well received, but I've a feeling that's because more then anything they are LOUD. This one by HSU seems worth saving up for, as it sounds like you can tune it to your hearts content, right down to choosing whether to have it sealed or ported: http://www.hsuresearch.com/products/vtf-1mk2.html . If anyone could suggest a sub that plays low frequency clearly - that doesn't have to be loud, that would be great! in other words - My biggest wants here are depth and clarity as opposed to loud.