AVO shocks are good, but not great. They are
oil filled, so no upside-down mounting. They are however, adjustable for dampening, and ride height. Any spring rate and length can be had for them, and they don't cost too much. However, they are
oil filled, so as they heat up, they get squishy. The first couple of laps they'll be firm, but they get softer as the
oil heats up. If this is of concern, look into Bilsteins. They cost only a little more, but perform a lot better.