I think my next upgrdad will be my subwoofer. Now I am using a JBL PB12. It works fine, but sounds a little boomy ( I guess because I didn't own better sub). I love my Paradigm Studio 40 V3 and CC470. And I want a better sub to match those best valued Studios.

I am thinking of following options:

1. Dayton Titanic from Parts Express. ( I wonder if I will have difficulty to sell it when next upgrade since it is not a famous brand)

2. A used Sunfire True Sub..

3. A used Paradigm around that budget( I don't know which one is good except the expensive Servo15)

I need the sub to be both good in HT and music. And it should have the best performance for the dollar like my Studio 40.

Thanks in advance.