I've been wearing a 4/3 Body Glove Fusion back zip that is in its 5th season and its served me well but it has been starting to leak, has a lot of ware-and-tare and is just getting old so I have been looking through some websites for new suits. I am going to stick out the rest of winter with the Fusion but I am looking to upgrade. I've been looking a lot at O'neil wetsuits and wanted some peoples opinions on them. I have narrowed it down to the O'neil Mutant 4/3 chest zip with the detachable hood or the O'neil Psycho 1 back zip. Has anyone had either of these suits that they could give me their opinions on? Also I was wondering what people's takes on back zip vs chest zip were? I know the chest zip allows for a lot more flexibility and not as much water getting in the suit but I have also heard that they are a pain in the a$$ to get on and off. Thanks for the help.