Shadorne - do you have any personal suggestions to listen to?
At your price point I would tend to go for better quality sound rather than huge bass extension to 27 Hz or below. My preference would be a sealed box design that rolls off gently around 50 Hz (still plenty of LF energy when you consider the boost from room effect).
Suggestions for something with a reputation for significant bass response but still of good quality (what I suspect you want);
my choice would be PMC IB1....try second hand and be patient. They aren't full range, not quite as dynamic as sealed box either, but very close to what you are seeking with great acccuracy and wow factor in the LF, IMHO. Unfortunately you will score close to ZERO in WAF factor ....but close your eyes and WOW!
WAF top score means elegant furniture, poor sound. WOW Knock your audiophile socks off = ugly brute, great sound.
That is just the way it is! No cake and eating it too! Sorry.