they are definately available. i have installed them for about 5 years . the M6 and M4 units are very easy to setup and a strong set of amps to really pump music if thats what you want and while i do install russsound and elan the proficient audio stuff if way easier to configure and very flexible since they have line level audio outs on each zone to drive bigger speaker arrays. i have always used unversal remotes and they work nice with them