Since you have already taken the online training I would continue with the PADI OW course. The number of people who get certified and then stop diving after a year or so is very high. I know of at least a dozen in SoCal who took at least one GUE course and were extremely Gung Ho about GUE, including several who used to post all the time on Scubaboard. They have either stopped diving cold water or given up diving altogether. It is a huge investment of time and money to go with GUE and then stop diving.