Definitely go with something above the base stereo. I got the base stereo and upgraded my front speakers within a month because they sounded so horrible.
Congrats on the anniversary though. Sorry if I made you feel old. I honestly wish I was a little bit older. Too many life-changing decisions I have to make right now. :p
Tokico blues should be fine with the C springs if they only lower your car about an inch. They shouldn't be bottoming out. Did you ever replace the strut mounts when you upgraded your suspension?