Mine is getting long in the tooth and will be sent out to pasture soon in favor of a Gawddammed Mac.
It's a monster, but starting to glitch out in ways that can only be the motherboard, and as soon as AMD released their latest flagship chipset, the AM+3 motherboards vanished from the market. If you can even find one now it will cost a stupid amount.
Anyway, it's a PC with AMD FX (Bulldozer) 8100 Unlocked CPU with 3.4 GHz baseline tuneable well into the mid 4GHz range with absolute stability assuming you have proper cooling and capabe power supply. I run mine at 4.1 with a liquid cooled CPU fan and a 900W power supply.
32 Gigs of 1800 RAM.
NVIDIA 850 PCI-E Graphics Card running a Crossfire Bridge with the onboard Radeon 640 Chipset.
Oversized case with 2 cooling fans on top, 2 on the back side, 1 ea on the front side and bottom along with the P/S fan and a separate fan controller.
500gb SSD Main for the OS and essentials.
250gb SSD secondary "Record to" drive that also hosts much of the DAW related stuff and certain plug ins.
60gb SSD third drive for more plug ins, sample library etc.
4tb HDD for Mass storage that is synced to an external 4tb HDD for back up.
As for DAWs, I've got 'em all. I have to in order to be able to collaborate on projects. I still run Sony ACID Pro 7 for new project ideas because it's still the most intuitive and user friendly while being very capable. I also run Cubase, Cakewalk/Sonar, Ableton, Propeller Head Reason etc, FL Studio, Reaper... All of them.
It all comes and goes via Focusrite Scarlett 2i4 Interface either direct fed, or from my trusty 10 year old Behringer 1202FX Mixer that is the toughest piece of gear I've ever owned. Someday it will rule the Earth along with the cockroaches. Sometimes I use my old (but killer!) ART Mic Pre box or it's D/I sibling.
For monitoring, it depends on the type of project. Although it's a cardinal sin, I do the rough mixes and tracking with my Beyer Dynamics DT-770 80ohm Studio cans. For low volume baseline submixing I usually just use my little Alesis cheapies to ballpark. Then I'll step up to a pair of Rockit 6s (?) or my old Tannoys if I'm feeling saucy and don't mind somewhat excessive volume.
But alas, as stated, my unholy beast is faltering a bit and ready to retire. It had a good run, but I won't start anymore new projects on it. I'm now shopping for a fucking Mac. :(