249 is pretty good, but should find out how many clicks its taken before purchasing, shutter failure occurs around 80,000 and to replace the shutter costs 250 through canon..
dust busting technology is a load of bollox btw.. there's a test somewhere, they tested 5 or so cameras, the did a dust sensor test before and after the 'shake' and sommat like 85% of the dust was still there, it had just moved