I wonder what would give the most improvement in sound?

1) add an ADA-1250 for L/C/R, or

2) replace my EP350 with an EP500 or

3) replace my EP350 with an SVS PB13-Ultra.

I seem to have plenty of bass for most everything, but may not know what I'm missing.

https://docs.google.com/spreadsheet/ccc?...amp;usp=sharing