Comes down to personal preference more than anything.
Like you i like the NV panel layout better and had far fewer problems compared to ATi.
However, to contrast this there are thousands of very happy ATi users so it must work well sometimes.
@ harris1986 - sorry some of your kit got held up.
gt
Well I don't really care for the layout, I just want to have as many options as possible, I don't like the layout of the new nvidia panel, still prefer the old one they god rid of in the time of the geforce 6 or7 series

Been checking some user and a lot of people seem to prefer ATI's IQ, I don't know though as I haven't tried em myself. However I can't seem to find any reviews showing so, most comparisons look the same to me like here:
http://www.driverheaven.net/reviews/3870-XXX/IQ.php
http://vr-zone.com/articles/ati-radeon-2000-series-launch-x2900xt-review-/4946-16.html
Some say nvidia is better like this site:
http://www.legitreviews.com/article/504/2/
Edit: Sorry to post this in your thread Harris, is there a thread discussing IQ already on ocuk or not yet ?