Mega valve amp fan since 1995 I would advise caution in moving into a future of valves. I am blatantly biased by valves clear superiority in the voice and midband but I am also aware that pretty much like vinyl, they can be a pain in the arse. Like vinyl they are highly addictive especially when you get hooked on swapping and trying other types of glassware (tube rolling) and like vinyl the whole concept is bloody expensive. My one piece of advice based on experience would be to stay away from cheap Chinese junk but have a damn enjoyable future experimenting. All the best.