I street drove the HELL outta my calvert 90/10's...they are definitely a loose shock, but you will be FINE...Unless you drive the car like its a lambo around corners, you won't even notice they are there until you stab the throttle hard and the front end really comes up (LOVE IT!). I drive my car everywhere, even in the rain on DOT slicks, and I can tell you that the shocks are the least of your worries....Guys on most forums make it look like 90/10's on the street are the ticket to getting yourself killed, but that couldn't be further from the truth in my opinion
Also, if you are going to spend the money on GOOD adjustable shocks, stay FAR away from the QA-1 crap...Have had way too many friends local to me buy their products, have them turn to junk almost outright, and then have QA-1 refuse to do anything about it (my one friend hadnt even driven his car when the shocks started leaking after 2 weeks of being on the car and they said it was his fault and would do nothing)...I rarely, if ever, see any QA-1 stuff on any car that is raced hard or street driven around here
I would look at a set of strange, afco, or if you really have the money, santhuff shocks... Thats just my .02 cents, good luck!