My new setup!
Used to have a Kurzweil Forte 7 with Kurzweil PC3K6
Many of the samples I used where my own (piano, brass, accordion, old-d50 stuff), so converted them into SFZ and am using Sforzando in Mainstage. others sounds from mainstage instruments and a few free soundfont files that I converted to SFZ.
I prefer the stability and ease of sforzando to the mainstage sampler.
The DMC-122 is great: only 18KG and I like the short distance between the keyboards. I'm able to trigger everything from the DMC, not touching the Laptop (Macbook Pro 2012 with 256GB SSD and 16GB mem). Around 25% load.
I use mainly aliases to keep the load low on CPU and memory. Also am using some tricks to use a separate control for both keyboards (mainly piano sounds on the bottom with optional pad/strings and al specific song splits and generatic sounds on the top). I do not use a patch for every song, but mainly select the right piano and top sound on the fly.
I did backing tracks from my Forte-7, now using mainstage for this. I trigger 4 channels and use a cheap USB DAC for the click output. Headphone output for the sounds. Mix everything together with the Rolls PC351 and also use it's DI.
For light effects I use a second-hand light (modified to LED and powered by the DMC USB output), had to refurbish al the electric and leather wires....
Made a wooden backplate as i did not like the metal looks of the DMC.
Seems very stable, pics are from it's first gig.