Well a few good questions.
We have not releasewd the Super Spires or the SuperSpires Referance series yet.
As we are getting all the documents in place.
And all these kits use our Shorter G3 series custom ribbon we have.
This is the shortest of all the G3 series in height and is also narrower as well.
This makes it a better use in the kits we have them in now.
As well these ribbons are used due to crossover points, center to center spacing.
As you know the shorter the ribbon in lenght the better the vertical dispersion this is why we use this ribbon in the center channels as well.
Very good Horizontal.
As for putting in the RA104.5 in the middle of these no.Not now.
But I will say we will have more center chnnels coming shortly.
As for acoustic match I am sure you will be very happy with the Lambda plus center then the HT2 as rears.
Very good acoustic match.