You NEED to read the 'boot fitting guidelines' sticky post in this subforum. Boots are just that damn important, the best board in the world doesn't mean shit if you're in too much foot pain to ride it. My suggestion is to go to the biggest local board store you'e got and just keep trying pairs on. Better yet, if you've got a place with a real professional boot fitter, go there. Bring your board with you, put the boot on, strap in, and stand there for 10 minutes to make sure you're not going to be in a ton of pain. Any shop with any self respect will see you through this process if it means a sale. Don't listen to any snowpunk employee, most have no idea what they're talking about and will just tell you whatever you want to hear to make a sale. At any rate, I went from Burton Moto to Vans Cirro, both are mid-flex boots.
If you're a beginner, a Moto will do you and your wallet just fine, but you're going to want something better if/once you get experience. I'm plenty pleased with my Cirro boots. It makes me shudder to say it, but I've heard plenty of good things about Burton boots as well. I've heard both good and shitty things about DC and 32 boots.