First, I'd like to say that I'm a certifiable Mario platformer whore, and I have probably always been more excited about Galaxy than anyone on this forum. The series is one of the few reasons I still play games today. To me, it's nearly impossible to choose between most Mario games, because they're so good. It usually comes down to nostalgia and my sentimentalism when deciding which one is "best".
Having said that, the original Super Mario Bros is my favourite game of all time. The joy that you had playing SMB3, I had with SMB. It was the first videogame I ever played, and I was mesmerised by it. No other game given me that feeling since... Mario 64 came close, though, which is why it's my second favourite Mario game.
If you put emotions aside, though, and do a technical breakdown like you did, Super Mario Bros 3 won't be denied. It's probably the closest to technical perfection that a game has ever gotten, even after nearly 20 years. Super Mario World is very impressive too, but SMB3 is just incredible.
As for Galaxy, well we'll just have to see how it stacks up, won't we? I said at E3 2006, when it was first revealed, that I haven't felt such a longing for a game since the 64 era. And now we're only a month away.
EDIT: But I'll have to say that I disagree with you completely on Sunshine, and somewhat on NSMB. Sunshine was lightyears ahead of any platformer out there.. hell, it still is. The control was perfectly tight, FLOOD is awesome, the challenge was there, and I didn't feel the setting was forced at all. Plus the water and the draw distances. I spent hours playing around in the water or getting to the peak of every level just to gaze in the distance. Sunshine is severly over-criticised by fans.
About New Super Mario Bros, it's still one of my Top 3 DS games. The game didn't focus on powerups, which is why many people were turned off, but the pure platforming was just fine. Also, the fact that it was the first 2D Mario game in 10 years made it much fresher to me.
Of course, it couldn't stand up against the S/NES Mario games though.. but then again, which games can? I read that EAD didn't develop it; it was another internal Nintendo team. That's probably why it wasn't as innovative as some would have liked. But that still doesn't take away from the fact that it's a quality game.