You've forgot to add an important option : Modding gear you already own and like.
Most of my plans for this year are in that department.
K1000s : PCB bypass and maybe recabling one of my K1000s.
RKV : Opamp rolling, stepped attenuator, adding an adjustable Meier crossfeed , fixing the transformer hum and a female XLR output are on my list.
AKG K340s and Senn HD 600s : I'll reterminate them to 4-pin-XLR.
Audiodigit T2020: Stepped attenuator and a female XLR output and maybe I will test a switching PS instead of the SLA battery.
Plus some DIY cables and exchanging the RCA SP/DIF into BNC inside one of my CDPs plus ............
Should keep me busy for the next months.
Besides of that I don't feel an upgrade or sidegrade itch.
During the last four years I have owned (or I had on long time loan) lots of cans.
AKG K81 DJ, K240S, K340, K701, K1000.
Beyer DT 531, DT 770, DT880.
Ety ER 4 P/S.
Grado SR 225, SR 325, RS-1.
Koss KSC 75.
Senn HD 540 Gold, HD 600, HD 650, HE 60.
Shure E5
Sony MDR-SA 5000
Stax SR-5, several Lambdas, Omega II.
Amps.
Marantz 2235 B
RA-1 clone.
Corda Prehead and Porta Corda II
Rudistor RP 31 and Egmont
Stax SRD 7, SRM 313, SRM-T1S, SRM-Xh
Vincent KHV 111 tube hybrid
PPA
CEC Amp 3300
Audidigit T2020
Audiovalves RKV I and II
Modded T-amp
Two different DIY tube amps
Senn HEV70
Sources:
Several soundcards,MF X-Ray, DIY NOS DAC, Bechmark DAC, Aqvox DAC, Thorens and CEC TTs
Plus brief impressions of lots of stuff at meets.
It was a nice ride, I've learned a lot and finally I do know what I really want.
Gimme a computer based rig for the flexibility, a decent DAC, some tubes in the signal path for lushness and improved imaging, and K1000s for a speaker-like soundstage, and I'm happy.
In technical terms there is gear far more capable than e.g. a PC-->AES/EBU -->Aquvox DAC --> RKV --> K1000s out there.I know that, I did own gear providing more detail/resolution and faster transient response and whatnot, but in the end it didn't sound as good to my ears.