Hi there, i am considering to buy a refurbished 2009 i5 iMac 27". Firstly would the 2009 iMac, sporting a HD4850 play compressed 1080p movies (of size about 4G) smoothly? My concern is that 4850 is very outdated and unlike the 5000 series, does not natively support GPU rendering of high definition movies. Secondly, i have heard rumors of a new iMac coming soon. From past observations, does this mean that once the new generation hits the market, the price of a refurbished 2010 i5 iMac 27" will be pushed down to the today's price of a refurbished 2009 i5 iMac 27"? Lastly, Apple says Lion will be available in summer, does this mean the Apple will start shipping new orders with Lion immediately after the WWDC in June or would we have to wait until September or October? Also how much does it cost to upgrade for major OS change (eg. from Tiger to Leopard)? Thank you!