12ax7's to roll

Happy Holidays A'goners. I have a Rogue Cronus Magnum that I bought from Agon. I love it and I'm curious about tube rolling. A very reputable tube source that most tube fans in the U.S. would be familiar with, recommended replacing my 12ax7's with Telefunken 12ax7's. They're really expensive as far as I'm concerned. I'm not wealthy and have kids in college. I could certainly swing it but is there other alternatives that cost less than $230 for a matched pair that will give me a good tube rolling experience? I currently have Sylvanias and I love the sound. I'm just curious as I've never tube rolled in my life.