[super kermit]

Must be

Closed-back - it is for home so sound leakage is an issue when gf around
Open-back - for when I am home alone
Replaceable cable preferred
Budget - $250 US per headset
Looks mean nothing
Microphone not needed, I can always add wireless mod mics later

So I need TWO pairs - one open one closed

THINKING

Beyerdynamic DT770 PRO 250ohm
AGK K7xx(massdrop) / K702
Sennheiser HD6xx(massdrop) / HD650
Beyerdynamic DT 990 250ohm
Philips Audio Fidelio X2HR Over-Ear Open-Air Headphone 50mm Drivers
Audio-Technica ATH-AD700X
HiFiman HE4XX (massdrop/drop)

Using Soundblaster X7 for amplifier etc. -

SPECIFICATIONS
Dimensions
130.0 x 150.0 x 147.0 mm (5.1" x 5.9" x 5.8")
Audio Technology
SB-Axx1™
Signal-to-Noise Ratio (SNR)
127dB (DAC)
Platform
USB 2.0, Bluetooth, USB 1.1, USB 3.0, Line-In
Connectivity Options (Main)
microUSB
Microphone :
Built-in Stereo Mic
1 x 1/8" (3.5mm) Mic In
Line / Optical :
1 x RCA Aux/Line In
1 x TOSLINK Optical In
1 x TOSLINK Optical Out
Speaker :
2 x Binding Post Passive Speaker Out (L/R)
1 x ⅛″ (3.5mm) Rear Speaker Out
1 x ⅛″ (3.5mm) Center/Sub Speaker Out
1 x RCA Line/Front Speaker Out
Headphone :
1 x ⅛″ (3.5mm)Headphone Out
1 x ¼″ (6.3mm)Headphone Out
1 x Type A USB Host Port - Device Audio Stream & Charging
Max Channel Output
5.1 Channels, Stereo Amplified
Audio Technologies
SBX Pro Studio
Microphone
Microphone Type: Dual-array Noise Canceling Condenser
Supported Operating Systems
Windows® 7, Windows® 8, Windows Vista®, Mac OS X v10.6.8 and above, Windows® 8.1, Windows® 10
Audio Fidelity
Up to 24-bit / 192kHz
Included Accessories