Here is the long version, which may explain the snide remarks. Just because equipment brands are not pedestrian but niche brands - it doesn't necessarily make the products better.
Few examples:
1) I know that MRX 540 =! MRX 520, but nonetheless -
objective measurements of MRX 520 are worse than Pioneer AVR.
2) Rel S/510 - I don't know if you purchased it anywhere near Its MSRP, but looking at the spec sheet: A 10" sub with passive RAD and 500W does not sound very impressive for $2750. Even what I feel somewhat optimistic about FR spec at -6db at 20hz doesn't sound very impressive to me, again, at that price. SVS/HSU/Outlaw/Rythimc/PSA absolutely walks over in both performance and value.
For example, a fairly compact (20" cube) SB16-Ultra costs $400 less and is miles more powerful. In fact, for that difference alone, you could buy an RSL 10 Speedwoofer sub.