I've been growing in containers for years now, and like Potawie, my container plants out perform any plants in ground. It really helps that I can bring them in on cooler nights, which allows me to extend my growing season. For containers you will want to plan on using pots that are 5 gallon minimum, last year I used a bunch of 10 gallon totes from walmart (drill some holes in the bottom) they were 3.50 each and held up very well. This year most of my plants will be in 5 gallon containers.
Now I know Matt50680 hates miracle grow potting mix, and that's ok, but if you can't find anything better, or are on a limited budget, it will work. Just keep in mind it isn't the best stuff out there, it does contain high amounts of nitrogen which can cause you problems. I'd recommend staying away from the miracle grow moisture control mix, it may cause you problems, especially later in the season. So if you are going to use Miracle grow, just get their regular potting mix. I'm not sure if Matt50680 has ever used Miracle grow potting mix, but I have. It is not my preferred soil as it isn't as light as I like that and the included time release fertilizer isn't a big hit either. I have started seeds in it, and have grown full sized plants as well. I currently have a red hab that is over 5' tall, which is growing in MG potting mix. It along with a basement full of other plants are doing great, you can see them if you do a search for my grow log.
Now with all that said, while I'm using MG for some of my plants to prove a point, my other plants are being grown in other soils because of the better results they provide. Don't worry too much about it as it really is hard to go wrong growing peppers, well just as long as you don't over water or over fertilize. They are very tough and can be hard to kill.