How long have you driven with it that low? I dont know about upgrading shocks, but I have an 05 on air with stock shocks and typically ride that low (around town) and mine are still good. I will try to help you answer this unless a knowledgable person can chime in.
i have been driving this low for 6 months now , iam pretty sure that my shocks are shot! i cant get bags yet, i just need to get some nice shocks, something you guys think will help with my car being like this. thanks