Re: Am I losing my mind ?
RX8 an interesting choice. I tried the high powered one recently, and it went pretty well, though the engine note gets a bit tiring and isn't as tuneful as the GTA.
Most disappointing aspect was the handling on a damp road, which was extremely hairy! Not as sure footed as my 156, but possibly on a dry race track would be grippier than the Alfa.
Brakes on the RX8 felt stronger than the GTA, but had a rather strange feel to them. Interior ok, but perhaps a bit over-styled.
Suicide doors are interesting, but because there is no 'B' pillar, they tend to flap when the front doors are slammed.
If you can live with the poor ride, go with the GTA. For better body control (but less poor-weather grip) the Mazda would be fine IMO.