The phrase "Dutch oven" is misused quite often.
A real Dutch oven has three legs, and the lid has a raised flange around the edge. This allows coals or charcoal to be secure on the top, and coals or charcoal can be added or removed underneath.
They are used in camp over a campfire, or with charcoal, or, they are used out on your patio at home.
What some people mistakenly call "Dutch ovens," are in reality, cast iron roasting pots, or stewing pots. These do NOT have the three legs, nor the flange on the lid's edge. They also will have on the underside of the lid, "drip nipples," or "basting nipples" to allow moisture to drip onto the meat or stew. (Try that "basting lid" when you try to make biscuits, cornbread, bread, cakes, cookies, etc., and see how mushy your baked goods are!)
A real D.O. lid does NOT have the "drip nipples" on the underside of the lid.
These roasters or stewers are for the top of the stove, or the stove's oven.
As for Lodge, if I were starting in to cook with a real D.O., I'd buy the Lodge 12", eight quart, "deep" D.O. Not much you can't do in that one as it is very, very versatile.
Stay away from the cheapie Chinese and Mexican D.Os. Often the lids do not fit correctly and they'll have "hot spots," which leads to uneven cooking.
Buy Lodge and if you take care of it (them), it'll last beyond your grandchildren's lives.
I have six D.Os., and have been using them for over 50 years. One, a 10" size, has been in my family for more than 150 years. Still a great D.O.
BTW, you should NEVER put cold water in a hot cast iron D.O., pot, or skillet. It will crack them.
Have fun.
L.W.