Which Subwoofer would you choose?


Hello everyone I’m seeking some advice on which subwoofer would be ideal. First off my tv room size is rather large, 20x20 connected to an open kitchen currently I have (2) Klipsch RP280F towers and an Onkyo TX-NR708 receiver, my budget is around $275.00 (Shipped) for a sub I found these 2 subs used locally both in good condition

Velodyne VRP-12 12" $120.00
Velodyne SPL-1500R 15" $275.00

I’m not sure if SPL or VRP is better? or if the prices of these are not worth it? Can I get something better for $275.00? any advice would help! thanks in advance.
mlaney
In your price range, you may be able to find a REL Strata . . . They are excellent and great for a music system.  I have one and am extremely pleased with how it works in my 2 channel system!
I'm surprised no one has mentioned JL Audio subwoofers, which I believe are outstanding, quite probably the best -- at any price level, the Gotham (the most expensive), the Fathom (the second-most expensive) and the "e" series.  The subs are quite solid.  they are not boomy, and do not over-emphasize the bass frequencies.  JL Audio, in my humble opinion, and owning 2 e-112's, is the very best.
Look for an SVS 12 " sub used on craigslist so you can audition it before you buy.  Might be able to find an SVS SB-1000 for around $275.  Sells  on Amazon for $500.00.  Google SVS and read the reviews.  A Killer company.
I've had bad luck with used subs. Think I picked up 3 or 4 defectives off craigslist over time. The likelihood that a sub has been over driven and damaged is not insignificant. My policy now is new subs only.
@gapperis123
Why are you surprised? Where might one find a JL sub for $275.00?