What you are asking for is compression of dynamic range. See, when you are watching a movie there is something called dynamics which is the difference between the loud and soft sounds. Movies that have a large dynamic range will typically not constantly deliver a bass line unless you turn the sub up. If you do that it will over power you when the movie gets loud. Do not use batman, superman and other marvel or DC movies. They are recorded with a large dynamic range and special effects. You don't know what superman taking off sounds like nor do you know what batmans car sounds like. Use a movie like say transformers age of extinction where there are multiple scenes with the Camero car chases. Listen to the Camero engine growl and use that as a bass line to set the sub. Then listen to a movie with a lot of vocals like a simple love or true story. You should end up enjoying the movie due to the emotional content provided as a background score by the sub. Then decide. Some subs hit hard while some are presence subs. You seldom can have both. If the sub hits hard you will find it very dry and lacking emotion. Just like a PA system. Hard dry bass. zero emotion. If it has too much presence you will feel it doesn't hit you hard. If it booms then either it wrongly designed, is underpowered, gain is set too high, positioning wrong or its just an el cheapy sub. Lastly, nothing can replace a 15 or 18 incher in terms of hitting hard. The only sub that may deliver almost everything you are looking for at your price points is the old horse Jamo D600. Try and chase them to let you audition it at your home. It was the only sub that sounded like a proper movie theater when I heard it long ago. Jamo has kept it in production for almost 15 years. Their other products are questionable but if they have not cut corners in quality over the years then this sub maybe your ticket. Avoid klipsch. If you don't have the budget save a bit and buy. Buy once and enjoy for ten years rather than be disturbed everytime. From my experience higher end rel and velodyne and maybe this Jamo are the type of subs you are looking for.