Another consideration is tube availability in the new product market. all manufactures have to buy for reliability, cost and future availability. so that NOS tube may be best but are there 1000's of them available at reasonable cost .....no.... So manufactures have to find the best avail tube in new production that's going to be in production for as long as the product. Not to mention spares for replacements.
If it was me I'd get the regular one and go to tubestore.com (others too) and buy a few different tubes to try out NOS if you can. not that JJ tubes are bad. I'm personally not a fan but have not tried them in quite a few years and hear the quality has improved greatly since.
If it was me I'd get the regular one and go to tubestore.com (others too) and buy a few different tubes to try out NOS if you can. not that JJ tubes are bad. I'm personally not a fan but have not tried them in quite a few years and hear the quality has improved greatly since.