Originally Posted by John_M
I've decided to go with the SR-3170 system
Don't forget to address the need to have your own PRIR made, rather than to try and "get by" with someone else's. There's honestly no comparison. If you want to get the most enjoyment you can from the Realiser and Stax system (or, if like me, you don't have your own genuine external multi-loudspeaker system and depend on your headphones 100% to listen to BluRay movies and HDTV), the PRIR is central at the core.
And although it's typically not free (unless you have some complimentary no-charge connection to some place with a good/great/superb sounding listening environment that will let you "measure it" for yourself), it probably will only cost the typical one-time $200-$300 or that neighborhood to arrange for a one hour "rental" arrangement. Ideally for best possible results you should also try and enlist the assistance of someone (e.g. Lorr Kramer, from Smyth, if possible) experienced in getting things set up for the PRIR measurement and also how to insert the two calibration microphones in your ears.
Many/most of us long time Realiser users have arranged for a visit to AIX Studios in Los Angeles, which has been extremely generous ever since 2009 when the Realiser was first released to allow the [non-free] use of their mixing room facilities to be used for PRIR calibration measurement sessions. Even if it meant a standalone plane trip to LA or as part of some otherwise planned trip to the area, the uniquely superb 5.1 and 7.1 sound setups in this listening room environment is just something most individuals would not be able to build or afford for themselves. To be able to capture it in a PRIR for yourself (with your own ears hearing the sound) so as to genuinely maximize the listening enjoyment capability of the Realiser, well it's really worth the one-time cost... even if it has to be planned for sometime in the future.
Congratulations on your "new toys". Hopefully you'll really enjoy the setup.