My DAW Studio based on a computer system I custom built myself that I am very happy with.
Win XP, Version 2002 SP2
ESC C51GM-M Motherboard
AMD Athlon 64 x2 Dual Core Processor 4200+
2.21GHz, 2.00 GB RAM 300GB HD
ATI Radeon X1300 PCIE Graphics Card

   

My keyboards are Yamaha Tyros & Motif ES6, and I actually still keep around a vintage Yamaha PSR-70. However, I don't really use it. Mostly let kids mess around with it. Contrary to an off the mark review which I read on www.SonicState.com, it was actually one of the first Programmable Sequencing Keyboards that hit the market way back when, with features that were quite usable if you took the time to tolerate how MIDI sounds were at the time. It was a real cadillac in it's day, considering what technology was offering at the time. The only thing it didn't offer which was available on other keyboards was touch sensitivity. I bought it in way back in '87.
RE: Tyros & Motif, I have installed an internal 60 GB HD in the Tyros and use an 80 GB USB external HD with the Motif ES6.
   
I play a Takamini Guitar F-340 with a Martin Thinline pick-up installed - now an archived model; the guitar for sure, maybe the pick-up, too, I am not sure. I stopped playing for a while, due to wrist & tendon problems resulting in surgery, but I am trying to play again - it's tough to be out of practice.
    
I am still trying to understand the Motif better. I really need to spend more time studying the DVD's that came with it. I would love to collaborate with someone who could give me tips.
    
I use an Tascam FW 1804 interface with Sonar 5 Producer Edition on Windows XP Professional. I highly recommend the Sonar 5 - if not for any reason, but just for what you can do with the V-Vocal. But the whole program is an incredible design. I really love it. I have been a Cakewalk product fan since I bought my first software from them many years ago. I think it was probably Cakewalk 3.0. I learn something new just about every week in Sonar Producer, which tells you how much time I spend in my studio.
    
I currently use three+ mics according to the need:
    
MXL 1006BP Large Diaphram Condenser , an EV N/D 767a Dynamic Super Cardioid, and quite recently I refurbished my EV N/D 357, which sounds just as good as the day I bought it over 20 years ago. I also have a couple of moderate quality generic (came with the Voco Pro below) mics kicking around for when I need extras and for when kids are here.
    

I also use, at times, a VocoPro DVX-580G. It lets me quickly change pitch of songs singers are singing - I is a Karaoke machine, but does a whole lot more with CD's, etc... I would like to put the manual up soon.

    
A JVC TD-W805 Dual Tape Deck helps when I need to bring any older analog material into the computer or working with friends who have their material on tape.
I use a Yorkville Sound (YS) (Traynor) BLOC100K Amp, when I go out, (I used to use it in my studio and when I go out, but now it just sleeps till I need it for big jobs). It has handled what I have needed for amplification for the last 20+ years. It puts out a heck of a lot of power and gives a wonderful sound for a keyboard and my guitar. Not a crackle in it.
   
I am now using 2 Roland Cube Monitors sitting on nice chunks of 2" foam. They do okay - don't nearly have nearly the sound that my Bloc Amp has but that is understandable since they are only about 1' square each. You can't compare 100W to 30W, even when doubled, just doesn't sound the same. But they are great little powered amps for my small room, now that I am using 2 of them and adjust the equalizer for the room.
    
I use 2 sets of Audio Technica ATH-M20 headphones to listen while recording - they prevents feedback as well as give me or the singer a very good feel for where they are as well as simply sound terrific. These closed back professional monitor headphones are excellent! I found one set about a year ago real cheap and the other one just recently on ebay for even less. So it goes to show you don't have to go broke to get decent equipement.