What subs have you heard.If you could give a listen in person to any sub and then share your experience.I feel the only sub is a DIY.First off because you get what you want and not a sub that fits into a marketing structure.There are a ton of subs in your price range.IMHO you need to get an impression first to compare.Good luck!
The reason I say "in person" is you need to hear and feel bass.My sub system has (4) 15" Adire Tumults with (4) Adcom 555 mkII's bridged mono.I use a Marchand BASSIS to extend the sealed response and a Behringer 1124p to remove the room mode problems.The room is acoustically treated to a "T" and I use TrueRta to get it flat to 10hz.This is bass that at 85-90db is world class.You my think this is perfect and if you are normal you will say subwoofer "X" at the local stereo store did it for me for a fraction.It's all about figuring out how much bass and to what quality you are looking for.
Let your ears tell the story.
The reason I say "in person" is you need to hear and feel bass.My sub system has (4) 15" Adire Tumults with (4) Adcom 555 mkII's bridged mono.I use a Marchand BASSIS to extend the sealed response and a Behringer 1124p to remove the room mode problems.The room is acoustically treated to a "T" and I use TrueRta to get it flat to 10hz.This is bass that at 85-90db is world class.You my think this is perfect and if you are normal you will say subwoofer "X" at the local stereo store did it for me for a fraction.It's all about figuring out how much bass and to what quality you are looking for.
Let your ears tell the story.