Hi, Just wondering if anyone out there knows the answer or has done any comparisons between all the MD and Hi-Md recorders out there for quality of recording assuming using the best mic for the mic input and the best analougue or digital source for the line input. i am interested in live stealth recording and currently use a sony stereo mic 710P I think. Why is the mz-R50 a popular unit when its codec is so old, or does it not matter? Does Hi-SP sound better than normal SP ? Thanks