I am a new audiophile. My starter setup was a Sennheiser HD650 and a Modi/Magni stack. I recently upgraded my stack due to my Magni taking a power surge and dying. I got the Modius and Drop+THX AAA 789. Was going to go with a Magnius but they were on a 2 month wait time. My question is where do I go from here? I did order XLR cables to connect the DAC and amp which are supposed to be here Monday and a balanced 4 pin XLR cable for my HD650 that should be here in about a week so I can try out balanced audio. My thought was the next thing to upgrade would be the headset, but I have no idea where to go from here. Keep in mind I'm in no hurry to do this as I just got a new stack and am trying full balanced setup for the first time. I'm sure this will keep me busy for awhile, but my curiosity makes me wonder what will be next. I feel like it's a lot easier to watch reviews and analyze DACs and amps than it is headsets. I know a lot of it comes down to preference. I was thinking maybe since I have an open back headset now that I should do a closed back next? Price isn't really an issue, but I don't want to spend $5000 on my next headset either. Anyway I'll shut up now. Just wondering what eveyone thinks would be the natural progression from the HD650 based on my current experience and hardware.