It's not of much importance to do everything at once, though it might be wise to do all rear suspension bushings at the same time as the struts, since you have to remove the rear uprights. At the front the only bushings are at the LCAs and the TC rods, 4 total, the uprights can stay in place bolted to the front strut.
I'd check the condition of the rear subframe bushings, and the tie rod ends.
The rear subframe bushings don't leave you much of an option if they're shot, you can either replace (meaning drop the entire subframe) or you can shove in spacers to take up the slack.
Tie rod ends, easy choice, Moog ends are greaseable, the OEM ends aren't.
I think you'd get the closest feel to the Spec V from Whiteline or Tein springs. The Suspension Techniques springs are okay, but I question their spring rate choices... Having front spring rates much higher than the rear like that will tend to want to transfer weight rearward more easily than forward, which makes a RWD car nice and stable below the limit; but driven near the edge it might feel front-light and, terminally, understeer. I haven't used them myself, though, to see how that translates to the real car. People seem to be very happy with Whiteline and Tein springs though.
I've heard some negative opinions about the Whiteline sway bars, by the way, but it seems to be an issue specific to setup. The endlink design is a topic of a lot of debate. If you don't forsee yourself using the adjustability feature of the whiteline bars, suspension techniques bars are lighter, the same sizes (or thereabouts), and cheaper, and they use stock-type endlinks.
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