The display panel is the exact same component used in the Sherwood - it would have been a needless expense to develop and manufacture a separate display.

There are some pretty extensive threads here in the saloon about THX, and there's a good article at Secrets about the various levels of THX certification. There is some real value to THX, but much of the non-certified gear now available from folks like Rotel, Outlaw, Sherwood, and others provides many of the same benefits (particularly in build quality and performance, but also a number of software items) that it's hard to justify paying a premium for THX.