Hoonsy
I notice in the main thread post you've swapped out the old with new Bilstein B6 struts + TRD springs. I know it's only been two days but can you comment on how you like them so far?
I have not had a wheel alignment yet so can't yet say how the car handles in a spirited drive. Initial impressions are a firm ride, and sometimes "bouncy" which reflects the higher spring rate of these Eibach 8215.140 springs. These are definitely stiffer than the factory 93 springs. I have driven a car with BC BR coilovers and would say that these are about half way in between. The Bilsteins kept the car nicely under control when I entered a roundabout right after a level crossing, all within the speed limit of course ;)
Hoonsy
I have identical wheel specs (except I run 245/40 rear rather than 255/40) and have been told coilovers won't fit, but it looks like you managed to get these Bilsteins in fine! Any photos of the fitment?
The Bilsteins have exactly the same dimensions as the factory struts. This is in comparison to coilovers which have longer springs that would foul on the wider wheels. You have no hope of coilovers clearing and will need to go to a 7 inch wide wheel, or getting spacers which is going to look silly. Even with the struts you're only looking at a few mm clearance between the wheel and strut housing. There is much more clearance on the rears so you won't have any trouble with either struts or coilovers.
Here are some photos showing the ride height with the Eibach springs: