I'm going to retube my Mesa Boogie 2 90 that I just bought and I don't want to break the bank. The thing has 8 tubes and it can get expensive. I'm going to mix 6L6 and EL34s (you can do this per Mesa in the class A sockets) and am thinking of going with all Ruby Tubes. I know that, like Groove Tubes, they are not a producer themselves but a reseller and I'm okay with that. I'm wondering if anyone has had any good/bad/any experience with them. Thanks!