Greetings good people! Need some advise. Uhhh, I used to have a 15inch Bob Carver sub. I have $300 to spend. I am retired and don't have alot to spend. I am considering buying between a Velodyne vx-10 or a Velodyne impact 12 from Audioholics store. Or a Dayton Ht 12 inch sub from parts express. There all under $300 could you please advise. Thank you.