All depends on your goals for realism or lack thereof due to the actual height of our rails available from most manufacturers. MTH ScaleTrax was the only one that attempted to give a better more prototypical appearance by using a noticeably smaller (and lower) overall rail on the outside and an 'inverted T' reminiscent of Lionel Super O track for the middle pickup. The others using 3 actual rails appear too bulky and overpowering, especially true with Atlas. MTH achieved a smaller track size differential that made our scale equipment appear more massive. I liked ScaleTrax and enjoyed working with it. Easiest flex (think HO flex) of all and solid rails. Needed more switches but their #6s were very good.
Ron H above went quite a bit further above using Atlas 2 rail Code 148 and added a N scale rail down the middle for electrical pickup. This looks great as in his photo here:
ScaleTrax was almost as nice as seen on my old layout here. The models appear to be larger than most due to the lower profile of the rails.
Especially this shot
