Nah. I play with a lotta bands that all play pretty loud and run sound. I admire your ability to convince yourself that there are "lots of smaller lightweight amps that sound exactly the same if not better than a V4B." I've seen lots of people that claim that and I've yet to hear one that does. I want to believe this as well. Please show me one.
I admire all of the effort that has gone into emulating all-tube amps (the Mesa WD-800 is the best, IMO), but there is simply no substitute for big iron transformers and vacuum tubes.
As I type, I am awaiting delivery of my next foray into tube land - a 100 watt version of Micah's (Arkham Sound) Ultra-linear amplifier. Basically, it is his vision and revision of the venerable Ampeg B-15. What's not to like about a B-15 with the power of a V-4B?