A 2A3 is a true triode.The EL84 is a pentode that they will wire up to run similar to a triode.I would lean toward a true triode to get the full benefit of one.That is with everything else being equal.In other words a better made EL84 can sound better than a poor 2A3 amp.The Antique Sound Lab "Tulip"is a decent sounding 2A3 amp.They've been making it for several years and keep raising the prices.Years ago they were $1000,now they want $1500 for a new one.I've heard people buy used ones in the past for $400.I don't know what one could be bought for now.It puts out about 3 watts real triode.
