I have a paradigm ps 1000 ,i would like to do a upgrade what should i do buy a second sub and run two or get a better sub and sell the 1000 i have 600.00 $ to spend room is 18 by 12 mostly for home theater, if i cant get rid of the 1000 might run it with the new sub , i looked at the jbl subs at best buy but my 1000 has more ass than they do thank you for your time