"...the bottom of the surplus barrel has been reached..." That happened long ago with Lee-Enfields. Even one in pristine condition with matching numbers can have bad headspace. And #2 and 3 bolt heads are scarce.
"...my C&R..." I've never understood why anybody would want one given the amount of required paperwork.
"...An M1 Garand should be on your list..." Yep. There is absolutely no rifle that's quite like an M1 rifle. And just because is reason enough. No C&R required though. The CMP doesn't require it. And you get a rifle you know is safe to shoot.
Spelling and grammar count!