My Studio Setup: Workstation PC,WinXP-Pro-32bit,P4-DualCore-3.46ghz,4gbDDR,NVIDEA Nvidea GeForce GTS450-1gb-Dual-HDMI,PCI-6xUSB O/B,8xUSB-PCI,2xDVD-R-RW,80gbSata-System Drive,325gb-Sata-Data Drive,1TB Ext.Usb,2xDelta2496 PCI-Audio(8in-8out-32midi)Behringer USB audio,O/B Lan,Audio(disabled).
Mixing Board,Behringer XENYX-X1204-USB, consisting of 2-track USB Audio Interface to Workstation PC.
Numark DJi0 USB Audio Interface (1in/4out)
Numark Total Control-midi controler ,fully supported & mapped for use with TraktorLE and/or TraktorPro..and now confirmed working on Traktor2 & S4)
Novation Launchpad- fully programable midi controller,supported by Ableton,also using Midi Katapult application with layouts and midi mappings for Ableton & Traktor 2
AKAI APC40, Ableton performance midi controller.
I use all the above to do various sets through Ableton LIVE Suite along with Traktor2, of which all my outputs go to my Behringer mixer and the built in 2 track USB audio (currently setup as my Windows Default Play/Rec Devices) allows me to send all output, including its built in effects processor, out to winamp to broadcast out to my shoutcast server–ALL on 1 PC!! Works great and all, but we all know what a disaster a LIVE set would be without a backup though.
My newest addition:
King Asus G74sSeries laptop -fully loaded, Intel-i7-2630QM,2ghz, 16GB ram,1.5gb Dedicated video,17.3″-3D-TV PLAY,webcam,,media reader 4xusb3.0 Vantec 10 port USB powered hub Native Instruments-Komplete Audio 6(superior for no MIDI latency, especially with my Asus Laptop) & the Traktor Audio 6 for spinning vinyl and timecode.