If you can wait for a new one to be built or can find a used Don Sachs preamp, just go for it — and it does use your desired 6sn7 tubes. I don’t think the LTA will give you what you’re looking for.
They’re obviously both great and doubt you could possibly be unhappy with either. I’ll just say Herron is no longer in business, which may be a consideration for down the road in terms of repairs. Best of luck.
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