Before you make further purchases, try placing the subwoofer in an alternate location. Play around with the settings on Subwoofer + Bass Frequencies on the AVR. Try different settings and hear the same music samples / songs which will serve as your reference point.
Since I am more into music, I decided to settle for the SB 1000 a couple of years back. Prior to that I used BIC America ported subwoofers like H100 ii and even PL 200. Before that were Boston Acoustic ported subwoofers and even Definitive Technology Pro Sub 800.
I use a Marantz SR series AVR, although it has Audessey XT32, I keep it on flat after running the setup. Dynamic Volume is on Light. These settings work for me. Bass Management on AVR is LFE + Main and cut frequency is 110hz for subwoofer. This ensures a decent overlap with the front speakers which are kept around 80hz.
The best rate for SVS SB 1000 pro would depend on dealer to dealer. The only thing to make sure is that 5 years unconditional warranty is offered with the gst bill. Best prices offered would be anything from a 5% to 15% less depending on how well you negotiate with the dealer. Before you take the plunge, try playing around with the settings on the AVR and sub (refer to the owners manual if not familiar on how to do it).You will need a couple of weeks to try these settings and experiment.
All the best!