That's nuts, I don't care if they are so magic they make bro-country sound good.
Holy grail tubes won`t make music you do not like better, but they sure make a tremendous difference with music you love imo. Everybody`s holy grails may be different though. One persons holy grail may be another persons crap sounding tube.
On that note just bought another pair of Heerlen d-getter 7L4`s. Think Ivan is going to have just 1 pair left after this so grab em while you can. Thought I would not buy any more Heerlen`s after I got my 2 pairs of PW but these tubes are very underrated probably because they came directly after the PW but these tubes are excellent in their own right.
http://www.head-fi.org/t/821126/final-pricedrop-fs-valvo-philips-amperex-e88cc-6922-red-print-d-getter-1959-heerlen-holland-factory-matched-pairs