Home Studio Setup, Your opinnions and sugestions please :) Options

[MoonDark]

Hi guys, I am starting out recently and I want to setup my home studio

I have the hardware , but I would love to know opinnions about how setting it up

I got 3 keyboards in my studio

1 Waldorf XTK
1 Triton Extreme
1 Yamaha Clavinova

I purchased a MOTU 828mkII to Connect to my G5 DP 1.8 ghz with 1.280 GB RAM
( here is a pict to the MOTU imputs http://www.encouragersoftware.com/profile/828MkII.jpg )

I also have a Roland KC-300 Keyboard amp , its not awesome but its neat
( here is a pict to the amp imputs http://www.yuumusic.com/rolandkc3002111.jpg )

I will be using the Logic Express app , I think its enough power for my needs ,at least now

The thing is , what do you guys recomend me to do to connect all my stuff to the 828mkII??

I only use one stereo output of each machine ( 2x plugs each one to get the stereo )

Do you recomend me to make that same thing with the 828 ???

Like ( === is equal to 2x cables )

Triton =========== [ 828mkII ] ====== [ Monitors ]
Waldorf========== [ 828mkII ] ====== [Roland KC-300 Key Amplifier ]
Clavinova========= [ 828mkII ]
Or do you recomend me to get an adapter to join both cables into one output ??

like

Triton ==========> [ 828mkII ] ???

Any other ideas ???

Thanks! , I would love to hear the opinnion of people with more experience