well thx has been visited in several/numerous topics here. it is basically a certification by thx that says certain aspects of the product meet their standards... usually some surround sound modes are included in the processing.

is it important, no.. does it assure a certain level or quality, yes. though many, many products including outlaw's would meet or exceed thx's standards if they chose to PAY to have their product certified. some do and some dont. the cost of this certification would be passed on to the customer, so often times this thx certification is passed over.

would i buy a product just because it is thx certified, NO. if the product that i wanted had thx, i would consider it a slight bonus, but nothing more...