100 wpc is plenty of power for any future upgrades. Typically you use about 10wpc
It's amazing how many people don't understand that. With high efficiency speakers, those "flea watt" amps get plenty loud on 5 wpc or even less.
Integrated Amp Suggestions
Looking to buy a new integrated amp. Needs to have home theater bypass and also ability to connect 2 pairs of speakers A/B. Rotel Ra1592 Mkii and Musical Fidelity M6si 500 are on list so far. Suggestions