neutralzombiei've heard a lot about getting custom liners too. i have atomic boots, but i can't remember which model, and i also used to rent atomic during my first season switch from snowboarding to skiing, and have tried nordica which the fit i liked best, though never purchased or tried out, gave up on lange and salomon, finding them too narrow, but have also tried dalbello and technica, which i liked less, and probably something else i'm forgetting. i looked more towards all mountain boots, don't really see myself needing full tilts. concessions have always been relative to price range too, but now i think it's a good time to get something that won't feel like it's hindering me.
The right boot will do wonders for your skiing (honestly, you won't even believe how you managed to ski before without them). This is why you should invest the time/drive to find a reputable boot-fitter in your area. If you tell us what area you are in, we could probably even help narrow the search down for you.
A boot-fitter is important because he/she will select the appropriate boot based on your foot shape, ankle flexibility, weight, previous experiences, and party based on what you would like to be doing with said boot. In addition, you should invest into proper, custom footbeds- you will not be able to have a truly well fitting boot without these. They are necessary for making the proper interface between your flexible foot and the rigid ski boot your foot is stuffed into.
As far as boot brands go, each brand makes a multitude of different fits. For example, here at Atomic, we have 95mm (super narrow), 98mm (narrow), 100 (medium) 101 (medium wide), 102 (wide) and every brand follows suit (with sometimes even more options). So to say that you don't fit well with brand X or brand Y, it's almost impossible to claim as there is no single fit associated with any brand these days. You might very hate one Atomic boot, but absolutely love another.
The boot-fitter will work with you to sort through all of the options and find the right match for your subjective biomechanical needs. Because there are so many factors in selecting the right boot, without someone there to assess your needs who also has a good selection of boots, it is pretty much near impossible to do on your own. Just go in with an open mind (meaning no brands or models "pre-selected") and see what works best for you.