lex-o-951

i want to lower my 01 is 300 but dont know whether to go wtih lowing springs or coil overs. I dont want to lose the nice ride as much as possible. Can anyone give me some names of some companys that make springs or coil overs? also does anyone know were i can go get the springs or coil overs installed for a decent price, i live in riverisde ca (951 area code) and am in orange county most of the week (714).

Can the HID bulbs be replaced with aftermarket HID bulbs? If i want to change my bulbs for my HID's to 10,000k bulbs would that damage my electrical?

I disconnected my negative cable on my 01 IS300 for about 15 mins and when i connected the negative cable and turned on the car my cd changer did not read that there are 6 discs in the changer. Before i had disconnected the battery my #1 disc had a cd stuck and would not eject it and the #3 disc would make a weird noise when ever it would play any cd's. Has this ever happened to anyone or can anyone give me any advise?