I got tired of waiting for my order. I was just able to pick up the HD-D1 from my local Wal-Mart.
I don't think it looks as nice as the A1. I'll have to take a closer look at the display model at BB to decide for sure. For now, I think the D1 goes back as soon as I receive my A1.
The A1 was about $90 cheaper as well.
I popped in Serenity, which I also picked up at WM. It is the only title I have for now, as my others are in transit. Only watched it for a few minutes, but the picture was incredible.
I tried a few SD DVDs, and the picture does appear to be noticably better on my display - 50" Sony Plasma - versus the Oppo. I wasn't able to do a comparison, but I know the movies well enough to definitely say that the Toshiba upconverts better than the Oppo on my display. My wife noticed it immediately as well.
The kids wanted to watch A Bug's Life, so that ends my evaluation for now.
I moved the Oppo up to my LCD in my bedroom to replace my old el cheapo (actually it was an old el freebie'o) DVD player. This is the first time I've had it hooked up there. Big improvement there as well. So overall, I am very pleased.
I'll try it out some more after the kids are asleep.