Mcintosh C2600 preamp tube upgrade


I recently added the new McIntosh C2600 tube preamp to my system. It's paired up with the MC452 power amp along with Sonus Faber Elipsa speakers and Transparent interconnects/speaker cable.
I"m looking for some guidance with regard to upgrading the tubes in the C2600. Should I, or shouldn't I ? 
Also, what brand should I look for and where should I buy them. And finally, is this a diy upgrade or should I have it done at a audio shop? 
I appreciate any guidance all you audiophiles can offer
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Showing 1 response by vegasears

I've also got a Mcintosh C2500 and rolled out the Mcintosh branded JJ's.  I am current using Genalex Gold Lion 12AX7, the gold pin ones.  Before getting the GL's I had Mullard 12AX7's reissues but not the 4004's, they sound just as good as the GL's and cost a bit less.