I hav´nt heard the original Lehamann BCL, but the stuff coming with the ebay-clones is not that terrific. But upgrading it is not so difficult and must not be so expensive. For me, I think it will cost about $300-400/ clone - and I´m doing two of them.
Stuff I´m using: Audyn True Copper 1,5uF, Mundorf EVO aluminium 2,2uF, FT-1 0,022uF, Styroflex polystyrenes 100pF/ 0,022uF, ST/ CDIL BD139/140-16/25, BC550/560C, , Nover Audio Grade/ Mundorf MLytic 10000uF 35/40V, Alps RK27 "Blue Velvet", 24 step ladder volume pots, Vishay/ Philips
BYV27 rectifier diods, LM317, Fairchild LM337, Wima MKP4 0,15uF, Wima MKP10 0,022uF, PTC, OFC-wires, RCA/ Phono jacks/ plugs, R-Core and other transformer, NE5532, LM4562 and THS4031/4032 on Brown Dog adapter (should even be better then OPA627).
So, as I told in the earlier post; If someone want any of those stuff I´m using, please PM me, as I´ve bought more than I need.
The Lehmann Linear SE, with Mundorf caps (M Cap as decoupling caps, it´s jus so so - about the same grade as Wima MKP10 for <$10), better internal wiring cables for the signal etc is a tad better then the standard BCL. Also, the price is about the same as the standard BCL.
https://www.lehmannaudio.com/assets/site/home_audio/pre_amps/linear_se/pdf/Lehmann-STEREO-02-2012-ENG.pdf
But yes, It should be very interesting to read your experience for the Linear SE to BCL!
For myself, I´m using Sennheiser HD600/650/800, Ultimate Ear Triplefi 10 and modded AKGK702. Other amp´s I have is: modded ProJect Headbox II, modded Meier Corda Swing and Harmony Design Ear 9. Other thing´s I´ve modded is my Arcam CD192 CD-player, Squeezebox 2, Creative X-Fi Elite Pro soundcard, speakers and some DAC´s I´ve built/ modded. (I can sell some of the above, if someone is interested - please PM me!)
Best regards: Mikael Markstrom