Does it even exist?

[LogicalDrm]

Roccat Ryos MK Pro would have audio/usb hub but its not close to affortable if you aks me. And propably too big for you prefs. I suggest getting external audio&usb hubs and picking just kb you like. Audio hubs are around $15 usbs bit under that or over with own power connector.

[origx36]

you probobly can get all of those fetures

but the keyboard wont be compact and it will be very very very expensive

[Heisenbleurgh]

USB hub, audio hub, cherry mx browns, backlit, good build quality:

http://www.maxkeyboard.com/max-keyboard-nighthawk-x8-blue-backlit-mechanical-keyboard.html

 

Available in mechanicalkeyboards.com and Amazon. I have it myself, it was my first mechanical keyboard and it's really good.

The Blackbird by them is another one to consider if you're thinking tenkeyless.

[Mansel]

QPAD MK80 in browns

[the1Diesel]

the only one i can think of is a ducky shine 3 tkl but its quite expensive

[Paralectic]

All soo expensive :-P

[Faz592]

Steelseries stealth merc would be your best bet but its a bit old