Would it be alright to use these for the front left and right and for the side surround? I have a onkyo 515 used as 5.1 and mainly watch movies currently looking for new house so cant guess at room size. Thanks!
I think that would be fine as long as you're using a subwoofer and not trying to listen at reference level volume. This would also work fine in an average sized room where your listing position is not that far away. Also make sure you use the matching center channel to have a timbre matched front sound stage.
Thats not very much different from what I run...70's main and 60's for surrounds (30s for heights and dual 505's to round it all out). Ran beautifully off a denon 1611 and now an onkyo 809. My listening position is approx 9 ft from the speakers and I could run a -0db all day with either receiver with no issues.
I don't need snobs to tell me how to think, thank you!