alrite, 1st off, welcome to NICO this is a good place to learn all about your car.
2nd, install these yourself, its just a basic swap, dont waste your money having some1 install these, you dont have to use springs compressors either, just take out the whole strut/spring assembly as one and swap in the coilovers, sways are just a basic swap over, just get a mechanically inclined friend to help if u arent comfortable in doin this by yourself, but it really is pretty basic.
the JIC's are very nice coilovers, but if you dont wanna invest that much, i reccomend the KTS/SPL coilovers, just over 1100 and comparable to the Tein HEs. SPL parts sells them and are also a NICO sponser, so check em out,
http://www.splparts.com ...i have their tension rods, subframe collars, and i got the CUSCO ruca's from them and i love all the parts!
as for anything else to do to your car, take the left over money that you were gonna use to have some1 install these, and buy a used vlsd. makes a world of difference in every kind of driving.
so good luck!
-Dan