@samureyex _ I agree with mesch, if your main focus with it is for movies and gaming, and what reads like from your post day time background listening maybe consider spending less on that amp; and using the excess funds towards your more dedicated music listening with your tube amp. As far as from where to purchase NOS tubes you can purchase from reputable places like : Vintage Tube Services, Brent Jessee, Upscale Audio and Tubemonger to just name a few.