Long time lurker 'round here... thought I'd finally register and post...
I have owned a '73 SG Standard since the mid-80s. Hands down, the best guitar I've ever played (IMHO) - thin, fast neck, lightweight, with great PUPs/tone. I own 6 Gibsons, and this one is my baby. I don't play it as much as I'd like, because I've kept it in excellent, all-original (less a fret job), condition, and I'm afraid of doing something bad to it.
Before the economy tanked, I saw these going for near $2000, but more recently at around $1500. If you can grab one in good condition for around that price, I'd highly recommend it!
DJ