Risque007 is right on - a suit is one of the best CC garments you can wear. The jacket covers the waist, the clothing is loose, and there are lots of pockets. So what's the problem? Actually, lots of problems, but what they all boil down to is that I've noticed that because many people don't wear suits much, they don't really have the "right" suit, holster, belt, etc to pull it off. I've carried with suits my whole adult life, and here's some hard-won tips:
1. There are two kinds of suit cuts - traditional and tailored (which is tighter fitting). Wear traditional - it will give you more options, and the looser fit is less constrictive. The same goes for pleated vs unpleated pants - wear pleats. In my experience, unless you are an unusual shape or carry a very large gun, you will not need to have your traditional-cut suits tailored to avoid printing.
2. The gun you like to carry drives almost everything else. Pocket guns for the front pants pocket work VERY well, especially if you wear suspenders (which are completely appropriate for good suits). However, the thin fabric of a good suit leads to printing, so this means a small gun and a good holster. If you carry at the waist (inside or outside), you'll need to get a good dress gun belt that narrows at the front so it doesn't look like a gunbelt. I use belts from Mitch Rosen, and it holds up well.
3. The final option is a shoulder holster, and that isn't driven so much by the gun as it is by weather, how much you sit, and whether you need to take your jacket off. A shoulder holster is murder in hot climates, because it prevents air movement under your shirt. A shoulder holder is a dream to use while sitting (especially in a car), and I'd say that feature is its main appeal. (Other than that, I don't think it has anything to offer.) If you need to take your jacket off, you're no longer carrying a concealed weapon, so consider that.
Good luck!