Yes, by all means consult with either GIK or ASC or both (or another acoustics company). If you are charged anything for their work, it will be refunded if you order, and it will be worth the price if you don't. There is some knowledge to be gained by seeing what more than one company recommends.
Everyone has run into successes with room treatment and a few things done wrong. My error in the latter, many years ago, was adding too much pure absorption to my audio room. That created an artificially dead feeling. The error can be avoided by using combination absorber-diffuser products (as already recommended) predominantly. Examples are GIK's Alpha series, the RPG BAD products, and most products from ASC.