I’m a sucker for cool looking custom controllers and input devices. If it has a lightgun, or an interesting steering mechanism or simulates a whole cockpit (ahhh, Steel Battalion, my preciousssssss) it has to be mine.
I’m really bad about it, too. I bought Gran Turismo III for the PS2 because I wanted to play with the Logitech force feedback steering wheel. Normally I’m not a racing game guy.
Lately I’ve come to terms with my addiction and have begun to look for review sites that cover things like this. It’s helped me avoid things like the P5 glove, which apparently doesn’t work very well. Or at all, depending on which review you read.
There’s http://www.joystickreview.com/ , which looks like what you’re looking for, only it appears to be a ghost site, the last review is from more than a year ago.
You can find reviews of random input products at places like IGN or PCWorld, but they’re not really organized, just kind of crammed in with other reviews and they have big gaps in coverage.
I haven’t found a good site that has comprehensive coverage of things like this. I would be quite pleased if someone did come up with one, though.