If you are looking into a full valvetrain then look into other brands. I've heard 1 or two problems with Skunk2 valves dropping. not sure if it was installer error or if the valves are poor quality. I've also heard of a few bad things about Crower rods, and that alone is enough to make me scared to run their other parts.

SuperTech has really good springs, valves and titanium retainers. My engine builder said that SuperTech uses high grade titanium in their retainers, unlike other companies. Others use poorer quality Russian titanium, and those have a tendency to wear out faster.