An ES-1 won't help my playing any. Like the Freddie King vid though. I'm a big Freddie King fan - literally. That's the one thing an ES-1 kit can help with, a big round guitar is slimming for a big round guitarist. Why do all the big big names have these large semi hollow guitars? It's because they'd make a Les Paul look like a ukulele.
I keep a couple of Rivieras in case I ever need to play in front of people... might need to get that SG double neck kit too...