(I'm sure you never expected to hear from me...)
In my totally unbiased opinion....
Go with the P1290. It now has 6.3 amps of current. You Morex 60watt is plenty for your M10000 system. The P1290 can power your screen at +12V @ 3 amps. It's a goo solution for your system.
Of course in my totally unbiased opinion.