I think you are on the right track with the cooling system so I will not go into detail there.
As for the suspension if you have any intent of doing any track events (and the rules for your class allow) do not go with stock bushings. If you are looking to retain 'stock' feel there are OEM options. Personally, I feel that urethane is perfectly acceptable on a dual purpose car. The most direct impact on ride quality is your shock/strut and spring combo. Bushings (especially the ones you have listed) have more of an indirect impact on ride quality.
For suspension I would start with:
Centered pre-pressed solid lower control arm bushings and a rear bushing kit like the one I carry
here. This combo will give you much better feel while maintaining ride quality. It is also the proper foundation to lay before (or in conjunction with) any shock and spring combination.
As for transmission and engine mounts I would go with some OEM options.
OEM Lemforder Motorsport Engine Mounts OEM Motorsport transmission mounts While you are there you will also want to take a look at your flex disk or guibo (the bushing between the transmission and the drive shaft).
I have successfully helped other members of this forum down the same path you are on. Feel free to give me a call to discuss. Ed 772.215.4069