poor noob being led down primrose path... yep, go for that metal base early dutch 5ar4 for a grand, oh, and pay up for a 4 notch plate blackburn as a back-up, but gotta be f32 in acid lettering...
here is the link to the head-fi rectifier shoot out ... https://www.head-fi.org/threads/dubstep-girls-massive-5ar4-5r4-5u4g-rectifier-review-comparison-rectifer-tube-rolling-thread.694525/ ... note the exclusive use of headphones and woo headphone amps, which can roll entirely different rectifiers (not just 5ar4’s), so these are not exactly circuits designed to use the strongest spec 5ar4 over 5u4, 5r4 and others of significantly lower spec...
wonderful what the old hands do to the new guy... sometimes we should check whether our own egos do a disservice to others new to the hobby here seeking guidance - well maybe our op is made of money... by the way there is a thread here on $20,000 cables... 😂