I have used the EH6922 in several different components and in only one unit did their substitution have poor results (my ARC SP10, in which I use 6h23's). Generally I found them to have a full bass, an uncolored mid-range, and not over-emphasized highs. No particular warmth, but they are not even close to the sound of a Sovtek which in most components will sound as cold as a well diggers ass. IMHO of course. Also, sound wise, gold pins are not additive, but since they do not corode like steel pins they should maintain a sonic constancy which can deteriorate with steel pins (that corrosion issue is the reason I pull and check my tubes annually). Electrically, unless the socket has gold contacts, gold pins are of no benefit. Personally I wouldn't pay more for the gold pins. BTW consider that many very highly regarded NOS tubes have steel or stainless steel pins.
FWIW