Pretty much every generation of Prelude is based on the Accord of the same generation but smaller and with more power. Even the latest ones had a lot in common with the Accord. BTW, there's been an Accord coupe since '86.

I don't think the TSX will be pitched as comfy, that's what the TL is for. All the alphanumeric naming crap supposedly has a meaning--TL is "Touring Luxury" CL is "Coupe Luxury" etc. I'm sure SX means somethin like "Sports Xtreme" or whatever. As far as marketing goes, they'll probably sell it as a sports car for people who need something bigger than a sportscar rather than a sportier version of a boring car.