I lean towards the 1500 just because I am of the mindset of it's better to have it and not need it vs not having it and needing it. The 1500 although more expensive affords me the flexibility and it gives me more reserve power if it were ever needed. Unfortunately, I haven't had the pleasure of hearing the 1100s but I have been running the 100s full range especially for movies. I sometimes flip between full range and 80hz for music. For studio music I tend to like full range and for live concerts 80hz. Mostly due to the fact I listen to studio on direct setting and live on multi channel surround setting.
