Equalization and bass traps

I just installed the Onix R-DES in my home theater system in my living room. Does anyone have an opinion about whether it is sufficient to focus on equalizing between 20-80 hz, rather than 20-120? If I limit my focus to 80 and below, I achieve a very flat curve (+/- 3db). But if I try to equalize all the way up to 120, the range is more like (+/- 7db) with some peaks right next to nulls. My speakers are crossed over at 80hz.

Also, does anyone have any suggestions for a company that makes bass traps suitable for a living room? I don't want many traps, maybe just one or two to put on the bottom part of the walls closes to the sub. The sub is already sitting on an isolation platform, which helps quite a bit.

Thanks