I cannot help you much when it comes to boots, and neither can anyone else much really either. Everyone's foot is different and each boot will feel different for each person. Try on as many different brands and models as you possibly can, and whichever one fits the best is the boot for you.
Here are some boot brands to get you started: ThirtyTwo, Rome, Burton, Vans, Salomon, Northwave, K2, Flow, Forum, DC, Nike, Nitro
If you do more freestyle (park) you'll want a softer boot / If you do more freeride and big mountain you want a stiffer boot. A medium flexing boot is usually good for both. Companies rate their boot flex independently, so just because one company says it is a "4" flex doesn't mean it's the same stiffness as another companies "4" flex... so don't put too much faith into those numbers. Try them on.