Welcome to a900 heaven. Have had mine new for 2 1/2 years now and it's been my favorite body. I upgraded from a a700 and its a huge difference, especially with primes. Love my primes on the a900.
Have to get used to the heft but get a good strap, sun sniper or black rapid and it'll be a lot more fun to use than the stock neck strap. You'll like it