There are admittedly loads, but when it comes down to it, it's only a couple that's worth mentioning.
Classic Controller [Analog Triggers]
Pro Controller [Digital Triggers]
Hori Turbo Controller [Analog Triggers]
Hori Battle Pad [Digital Triggers]
I'd personally go for the Classic Controller and Hori's Turbo Controller, even though I already own two GCN controllers as it is. It's just cool to own them and they don't lose their value. Either that, or a Brooks converter which I read works very well.
P.S. I used to own that Hori Pikachu controller, it was really cute.
Classic Controller [Analog Triggers]
Pro Controller [Digital Triggers]
Hori Turbo Controller [Analog Triggers]
Hori Battle Pad [Digital Triggers]
I'd personally go for the Classic Controller and Hori's Turbo Controller, even though I already own two GCN controllers as it is. It's just cool to own them and they don't lose their value. Either that, or a Brooks converter which I read works very well.
P.S. I used to own that Hori Pikachu controller, it was really cute.