Your question: "Do you guys think I would benefit from getting a tube amp?" is possibly better phrased as "do you all think that spending the money and investing the time in learning to use a tube amp will benefit me and my musical goals" ... the answer is likely no. Your time, money and energy will always be better spent on education and grinding on basic technique. But that statement is true for all of us, no matter how many decades we have been at it. Now would I say that getting and learning to use a tube amp would be fun? Heck yeah! Get a little 4 wat Vox with a 10 inch speaker and dime that bad boy to get a thrill that you wont forget! But the only way it makes you a better player is by inspiring you to plug back into that Katana, put on some headphones, set the metronome to 85BPM and run scales across the neck, going through the modes, the pentatonics, and around the circle of 5ths..... yeah.... its all just math and repetition. That is what makes you a dramatically better guitarist.