I'm currently debating on adding an amp to my setup and (although I know it's subjective) wondering whether a couple of the options were actually an upgrade.
Setup:
Onkyo 807 (rated 135x7), Focal 800v cc (center), Focal 814v towers (fronts), HSU vtf2 mk3 (sub). Effective room size 40x25 (living room open to kitchen, vaulted ceiling, not ideal I know).
Options I've looked at: (all@8ohms)
Parasound zAmp (rated 45x2), Parasound 2125 (125x2), Emotiva upa-2 (125x2), Emotiva xpa-3 (200x3), Onkyo m-282 (100x2)
Open to other suggestions, just the ones I've looked at and debated their merits. I wasn't considering the zAmp as it didn't seem like it'd be enough but someone I talked to said I would notice a difference over the receiver at the least.