Personal Preamp Evolution

I found the the threads on the amplifier evolution very intriguing,the speaker evolution thread as well .I am not sure if there is already a thread regarding preamps.Many of us failed to mention their preamps[myself included] in the amplifier thread.After all, it really is an amplifier per say.
1967...Dyna pas 2 from a kit
1974...Dayton wright spa
1975...Mark Levinson JC-2
1976...Audio Research SP-3
1977... Van Alistine mods on Sp-3a,removed tone controls etc
1981...Audio Research Sp-6a
1982... revised to sp-6b
1983...traded back to the Audio Research sp-3a and modded further
1976..Audio Research Sp-10,revised to 10b[still in use]
1990...MFA Luminescence B[still my reference]
1996...ARC sp-8 mk2,Cat SL1 signature MK2
2000...DIY line stage,tube rectified,6sn-7gt's for gain.
2002 to present...Supratek Syrah,