I started with a .300 Win. Mag. Kind of dumb but I didn't know any better at the time. I shoot a 6.5mm flavor now which gets to 1000 is near same form as the .300 WM and for less $$$. However, I still break the .300 WM out for beyond 1000 yard fun.
A good piece of glass is like a fine piece of ass. There is no known substitute known to man, and neither are cheap.