Howdy... I have done what you intend to do.
I take it that you already know that Bose has weirdo impedance to the speakers... and the line levels to the amps are all different so you need line level adapters or a processor... You do loose the roof up roof down compensation... and a roadster isn't the best platform for good sound unless you throw lots of grunt at it, if you are intending to keep the amps and speakers intercepting the signal and processing it has been written up in the interwebs before.
eg a cheap version here that i had bookmarked years ago
http://forum.miata.net/vb/showthread.php?t=272802 I don't remember why...
I claimed KM for my car back in the day, so i needed to demonstrate full handsfree connectivity, plus one $hitty tweet, so i did a full bosectomy.
Anyway, you ask about the aeropro fascia kit... here it is, there is a lighting angle difference (the colour matching is better than the photo gives credit)

long shot

I got it and the wiring adapter from Soundmaster in Granville, note that the headunit that I got was programmable for steering wheel controls where I could program what each button signal did (they don't all do that, it needs to say steering wheel remote ready or similar). You are in tazzie, but they should be able to help pick the correct harness (I cant remember which one, and I ain't going to pull the HU to check for you sorry)
Because I am particularly retentive, I didn't want some flashy trashy HU, I want the head unit to look like it belonged in the car from the beginning, as if it may have been there from the begining and match the instrumentation exactly (is that what you mean by subdued?)... So red button illumination, red/white lettering, and a red/black background + all the connectivity. The colour/font/matching was the hardest thing. I landed on JVC for this reason (JVC & Kenwood are the same company, but the Kenwoods did not look correct funnily enough, nor the Sony, nor the Clarion of the day as virtually all were blue themed). In the dark the matching is awesome (when the instrument lights are on).
Note, no single Dins looked correct at all.
Mine is a couple of years old but will do full connectivity, play usb or ipods (via the one USB adaptor) full stream music and stream pause play Tune in radio, Pandora, Aha etc... phonebook, history and full hands free calling etc.
what it drives is a full bosectomy, but that is another story...

hope this helps