Of course the 800+ is great amp for both Pro and semi pro gigging bassist
It is all Andy in it's design: the BD, WD and TT are his excellent in recreating popular Mesa Amps many have missed and pined for and at the same time cured some of their quirks and made them better and more effecient (friendly) for Players
I am always glad to hear those that 'Beam' about D350, D800 and 800+
as it shows Andy's Skill as designer and sole creator: yes He is also creator of others but in a different way and goal
I have WD and am extremely content
and have no 'Gas' for a change but I am confident I would be perfectly happy with BD or 800+ but I stay out of what's the Best debates knowing that can be different based on players personal taste, Bias and perceptions
Since I am getting what I want from WD and Subway 1X15 it doesn't mater (for me) if maybe there are Amps out there that may even be somewhat better for me from any manufacture not just Mesa
That seems to have the potential to be a never ending chase and quite expensive