I have a 2010 iMac with 10.7 installed. I tried Kies and couldn't get it to work at all. I installed iSyncr with the wifi add on. Yes, it costs a few bucks!
iSyncr allows me to wirelessly sync my playlists, including Smart playlists to AND from my phone. I think it also updates the play count. It uploads any music I buy from Amazon MP3 and adds it to an Amazon MP3 playlist in iTunes. It also uploads photos taken on the phone if you choose.
I have mine set up to sync at 2:00 am every night. It works brilliantly with no brain damage. I honestly don't even think about it except when to post about it here.
iTunes is the gold standard IMO and drag and drop is not an option for me. Two way syncing automatically without having to connect is the way to go. It works as well as the iPhone sync, wifi sync when connected to a power source.