The Sunn Coliseum-300 I had was a great amp, just heavy as a boat anchor.
Maybe by today's standards but not when I traded an 85 lb. '69 SVT head for its svelte 30 lbs and 300 watts in 1974. Ended up using 3 of them with 3 SVT 8-10 cabs by '77. The Coliseums would never warm up a cold practice room like the SVT, though.
I'm with Buzz. You want vintage, buy it. Plenty of HiWatts, SVTs, Oranges, etc. out there if you look...and they can all be made as good as new or better by a competent tech. And it's pretty much a certainty they'll be worth what you paid or more if/when you want to sell. Probably not the case for a clone.
