Currently I have an Ampeg portaflex pf 500 solid state head. It's great Head as most Ampeg product is but I'm looking for more tone options or more grind and grit. I would like to go tube also. Really I would love a v4b but I just don't have the $$. I'm taking steps towards the big boy. I have a SVT classic 610 HLF cab and I wanna move up a step with a different head. Pretty much I started my AMPEG line from the BA series to portflex to now possibly going pro series. I've already posted a thread asking for info about the Pro 3 but I want more info about it. Is it better then then portaflex pf500 ?