in the price range you are considering.... there are no other speakers I would consider. I am not biased... loving my rs8's has been a long painful road and im not quite there yet. Im still debating whether the silver line meets my expectations. For me though, the next step up from GR60's is, well, crazy speakers like wilson or dynaudio. The gr60's are close to sonic nirvana, and I used to go to good guys (before they went BK) and sit on the couch and just listen to the GR60's. If this price range is where you want to be, then you will search far and wide for any brand to best it.
not sure about MA, but I can say that paradigm subs are the worst I have heard... and I am coming from being a rabid die hard paradigm fan. I was not even a little fan of the GS.
think about this. Timbre matching/brand matching within a brand for center and surrounds is encouraged because they will all use same/similar woofers. In the gold series, you will have the same driver and tweeter in each speaker. But the sub? What does that have in common with the other speakers. Crossover, magnet, coil, tweeter, dimples?? None. MA makes speakers... they make damn good GS speakers. But subs? I would stick with a company that focuses on subs and makes terrible speakers. Subs and speakers contain mutually exclusive parts.
counterpoint: manufacturers may produce the sub to compliment the speakers that they make, making a perfect match.
response: I think MA and paradigm didnt really do that. They made a sub and crossed their fingers. "hope they compliment eachother, fred." "Of course they do, John. We made them under the same roof!"