Tubes Recommendation for McIntosh Preamp

I have a C2700 with similar tube complement, 2 for line stage, 2 for MC, 2 for MM, I replaced them with NOS tubes and its much much better then the stock JJ tubes mac uses (way to bright, toneless). 

matching is cheep, why would you not get them matched.  

 tube depot, tube store have tube kits for these preamps you may want to check that out first as a starting point. New production tubes in the kits but NOS tubes are all over the internet some good some bad. google is your friend. 

I'm using some RCA 12ax and 7AT's not the most expensive tubes in the NOS market (I payed $25 each)but they have similar detail to the JJ stock tubes and have much better sound staging and bass control, not overly rich like some of the other NOS tube like the apprex and mullards. I have a really handy chart with sound characteristics of the 12 series tubes I'll see if I can figure out how to post it here its saved as a picture. 

I sent you a message with my email address i’ll email it to you i can’t figure out how to post it here. Ive also put it in my system pictures for anyone else. good for all 12 series small signal tubes like the 12ax7, 12at7, 12au7, etc. chart says 12au7 but they are all similar enough the charts good for all 12 series.