I know for sure that HWRT is building up its infrastructure.
No matter what, an AHCI is an independant man. However, the service that an organization that thrives on service, like HWRT, is unbeatable.
Aesthetic wise, even the HWRT has an advantage of having a solid design team actually refine, if at all possible, the more individual designs of PSM. This is of course very subjective.
I am sure, either choice, IMHO, is excellent.