NIce to see another 99 in the forum WELCOME.
as for suspension mods i woudl stick w/ what u have because if your drivig on the highaway alot u dont need or want a harsh ride.
what you should do now...... is 2 things
get a cone style K&N airfilter ( doa search youlll find the part # i think its re9020 )
then get some valvoline throttle body cleaner. take off your mass airflow sensor screen and spray down the throttle body. You wil get NOTICABLE improvement vs what u have now.
doa search for more details.
also a fuel filter and tranny flush would be a good thing ot do right about now
as fasr as looks 20% tint is awesome but find out the laws are first, i got busted already. lol
if you want to see some basic mods/ appereance things take a peak at my site i have done alot to make it different and i havent even begun.