I recently got a Leica M8 as a gift from my cousin and now I am looking for a flash unit. I am not a professional, but a serious amateur photographer. BTW currently I am looking at Leica SF 24D and SF 58 flash unit, but can't decide which one to choose. Need your help to buy the best one. I gonna check out http://www.dealrocker.com for discount and price comparison. If you have any better recommendation, please let me know. Thanks..