Interesting contributions ....
In addition to the wonderfully well conceived, built, measured and reviewed, .. Seaton Submersive, I always felt HSU's sealed 15" was a great choice/value as well. And in duals, and even quads, they become inherently quite versatile in room optimization. Very high driver quality and implementing multiples is just a can't go wrong
proposition. Now I have always thought that their power amps could offer up a bit more, but you can't argue with their results.
Rana, I've owned Velodyne products for 20 years. Even though they're no longer a part of my HT, they certainly were quite the innovative leader, paving the way for those to come. Their current lineup is strong performers, for sure. However, I'm not inclined to characterize them as a high value choice. Aesthetically pleasing, broad international dealer support base, but a good value, ... not so much. At their price-points, they can be easily be outperformed as far as measurements go.
Originally Posted by Gorilla83
In the coming months I'd like to experiment a bit with some DIY
to see what type of value
I can pull together.
Some solid picks in your sub list.
With regard to a DIY effort, how's this?;
Infinite Baffle sub @$1300, (4) 18" Fi, IB3-18s, merely powered by a couple hundred watts per driver (Berry EP4K), achieving 124dB (127dB peak)@1m@20hz, below clipping, low wattage-low compression, thus highly dynamic. Just but one example of DIY value you mentioned.