Ya should've asked me on ICQ
If you can afford a good personal trainer (which no doubt you can), it will be worth it if the personal trainer is good. As described above by sean, there are some personal trainers who aren't exactly up to par.
A good personal trainer will make the transition from your current lifestyle to a more healthy lifestyle as easy as possible, and practically unnoticable. He/she will work with you, and not against you when it comes to preparing a diet. A healthy diet doesn't have to suck, it can be very good - but everyone has their own preferences and it's a matter of evaluating by trial and error what it is that will work for you, your budget, and your schedule.