Quiet pump in sump?

[newreefer_59]

Just wondering what pump is more quiet than the one I purchased a few months back. Just set up my 150 gallon reef aquarium (60X24X24) and the pump is a '180' but will have to doulble check that. Anyway, grinding noise is a bit much for the area it is in and would prefer a quieter and equally adequate pump. Any recommendations and approx costs. Thanks.