Hey guys, I'm going to look at a used SR500 today and possibly buy it if I like it, but I have a quick question about it. I remember reading somewhere to watch out for older versions pre-2010, as they were not as good. The one that I am going to see does not have the little 'mid frequency selector' flick switch on it, so I can only presume it is an older model. The serial number is 081264241 so I presume it was manufactured in December 2008. Is it still just as good? Worth buying?