PME Supatube tips are my very favorite icing tips to decorate with. The longer, narrower, length of the tip allows for more precision than other brands of tips. Also, the seamless, stainless steel construction allows for perfect steady flow of icing, while reducing the chance of the icing curling from the tip.
The No. 2 tip is great for flooding, the No. 1.5 tip is awesome for final outlines and smaller details, and the No. 1 tip is perfect for finer details. I use all 3 sizes repeatedly.