I think something that should be noted with coilovers is that you need I have them set up right to have them ride the way you want. Adjustability is only as good as how it is tuned.
For instance, standalone vs piggy back. If your looking for a mild power increase, then piggy back would best the simplest cost effective way to that goal. You could get more performance from a full on standalone but that entails lots of tuning to get the same quality/smoothness of drive as the factory computer can give because the manufacturer put 100's of hours into its setup/tune. Same goes for suspension. It can be done, but it's much more work. Also a "comfortable ride" is something that's extremely relative to the individual person.
Depending on how involved you want to get into the setup and adjustment of the suspension is how adjustable of a suspension you should get. If your more concerned with driving it then cutting tenths off lap times I'd stick with a good quality strut. But if your extremely particular about having the exact height you want then coil overs is your only option.
Just food for thought.
As far as control arms and such, stock is fine unless you run out of adjustment when trying to dial in an alignment. Then the custom arms that are adjustable will allow more adjustment so you can properly dial it in. The arms run around $200 per pair. The rear has three lower pairs. Kinda pricy.
For bushings, I have the front and rear energy suspension kit in my car. They come with a lube. I believe it's called "gorilla snot". They've been in my car for a few years now and I have no squeeks or noises. Before you buy the kit you may want to see if your alignment eccentric bolts are corroded/rusted solid to the inner bushing sleeves. If they are the origional bolts will need to be cut and calling it a PITA is a HUGE understatement. Took me 2+ days, around 5-8 sawzall blades and around 6 4.5" cutting discs to get everything apart. IIRC to replace all the camber bolts that you cut out is around $150-200.
The suspension on these cars is old and crusty unless you get real lucky. Make sure you don't need the car for a couple days before taking it on.