I prefer an iron with some weight to help flatten the fabric. As to the brand, you actually need to find what works for you.
Many people complain about Rowenta irons. I have had a Rowenta for about 5 years and (knock on wood) have never had a problem with it. Somewhere (years ago) I read that using 1:1 ratio tap water to distilled water in the iron. I've always used this and have no problem.
If I had to buy a new iron I would most likely try to find a plain old fashioned DRY iron. I have found I get much better pressing results if I use a dry iron and spritz water or liquid starch. I seem to get a much flatter press and if I am needing to "adjust" a quilt piece this method gives me the results I need.
I usually do not pay attention to brands now days. I look more for WHAT I want. Albeit, when I bought the Rowenta I was going by brand name, but I'll not do that again.
Good luck with your search.