Hey Everybody. So, I know these types of questions come up quite a bit but I was hoping some of you can point me in the right direction for building a project Studio for somewhere in the area of 9k. I know there has to be a beginners tutorial for home project studios somewhere that breaks down and elaborates on the necessities to getting started (interface, mixer, controller, DAW etc…)---but I cant seem to find any good ones.
As of right now, I have a Korg Trition PRO and a few good studio monitors. Even though I already got a MIDI controller with the Triton, I am really looking for another keyboard with weighted keys and an extra octave alongside it’s patches/features rather than just getting the rack. Im kinda split between the new Rolands, Yamaha or just the classic Kurzweil but I can wait on that for now if it really imposes on the budget.

I really want my studio to revolve around the computer system since it seems there usually the first to get hit with the technical glitch.
I was thinking LOGIC running of a >2ghz G5 with a cinmena display will keep me in business for a while.

This is what Im totally stumped on.
The Mixer and Interface?---For somebody who is doing quite a bit of MIDI alongside Micing the occasional vocals, what do you recommend for a Mixer? And waats the deal with this interface?
The only other things I have to set aside some money for with this first installment is a Good vocal Mic (that will deliver a good sound from an uprigt piano too), a couple libraries, the AD converters of course and a decent beatbox.

Keep in mind this studio will grow as time goes on so I want it to be expandable but for now I just want to start getting some stuff on paper. Thanks for the help everybody.