Digitalcamerarview just posted their latest Sony A850 test. If you read the pro and the cons list you will not find any surpise. The Sony A850 has an excellent resolution and dynamic range and has a not so exciting High-ISO performance.
Click here to read the review: http://www.digitalcamerareview.com/default.asp?newsID=4186&review=sony+alpha+dslr+a850
Click here to check the current price on Amazon: Sony Alpha 850