My most accurate 22lr is my Anschutz 1907 repeater, but it is well above your price range, and very heavy. My Brno Model 4 is very close behind accuracy wise, but they are long out of production, and they are quite heavy as well. However, if you look around a nice one can be had for around $600 to $700. My most accurate sporters in 22lr have been my Cooper Jackson Hunter, my CZ452,my CZ455. and my old Remington 541S. The CZs and my 541 are very close, with the 541S being ever so slightly more accurate, perhaps due to the better trigger. If I had to buy new, I would go with a CZ453.