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 3 responses by jeffinnh76

Noob question: do I put one of each: 12ax7 & 12at7 in place of the stock tubes? 
Hi folks - I'm looking to do the same thing: replace my analog tubes work some Gold Lions. What tubes on the C2600 would be the ones I want to swap out?