If you were a tube preamplifier manufacturer


We all know NOS tube prices are increasing and getting hard to be obtained day by day,there are several new production power tubes accepted fine performer such as Gold Lion Reissue KT88 and KT66,Shuguang KT88 SC, EH 6CA7,JJ KT77, etc.. among the audiophiles.
If you were a tube preamplifier manufacturer,which type and brand preamp tube you would choose from the new production tubes and why?,considering
its linearity,frequencies band from top to bottom, noise and microphonic clearness ,dynamic and rich midrange spectrum,etc.. ( I find some tubes are noisy or microphonic some has great top end but loose the bass region or just the opposite ...)
Is there any new production preamplifier tube being great performer like the new production power tubes mentioned above?
Thanks
ben

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