yeah thats what i might do
i got to think though cause $800 is still a big price for a hobby but i'm getting sick of this spider ii that i had for three four years now.
yes, 800 for a NEW 6505 is a great deal. but used ones go from 500-600 used here and there.
and there is NO difference between the 5150 block letter, signature and 6505 heads. all the same circuitry, just different stock tubes (which should have been changed out long ago). so dont let that judge the price for you either.
and if you want a cheaper 5150 find a used peavey ultra series head.