I think you would be very hard pressed to find a sattelite that sounds half as good as the Mythos one towers. If there is one out there, I've never heard it, or read about it. The Mythos has multiple drivers and pretty solid, advanced, enclosures. It is a full-range tower speaker. Most sats are not full range, despite what their marketing materials may say.
I haven't heard the Paradigm studio 60s personally, but I know they are a very reputable speaker company with great products. I suspect the paradigms and the Mythos ones are pretty comparable in sound, value and build qualilty. But the only way to be sure is to audition them both with your own favorite source material, and if possible with the same equipment and in the same sound room. That's not likely unless you find a dealer that carries both brands.