I’d probably go with a Buffalo Classic USB Controller for the price of a converter and a Retrolink. I don’t own one myself 'cause I settled on Saturn SLS replicas for my 2D video game playing needs. It basically has all the buttons I’d ever need, except select and let’s face it, how often does a game actually use select for anything useful and even if I did need select, the saturn controller has more face total buttons than an S.N.E.S. controller, so I can map it to another blank while if the S.N.E.S. controller needs a C or a Z, I’m kinda screwed. That isn’t to say I don’t like the S.N.E.S. controller, heck I’d even prefer it if I wasn’t worried about being in want of more controls. At any rate the Buffalo Classic USB controller seems to be a near perfect replica of the japanese pad except for differences with the D-Pad.
The most notable difference I saw in some disassembly pictures. Unfortunately I don’t think I should give out the link to the thread since the ones I came across was at a somewhat shady looking romhacking site. The only thing of note the comparison pictures showed that the Buffalo’s D-pad is just a cross, while the authentic S.N.E.S. controller had a cross on a hidden disc. Can’t say I’d know how big of a difference that makes. If the thickness of the D-pad itself is a problem as shown on the video, I’ve seen NES controller rebuild/repair kits on ebay that are bundled with a D-pad membrane that might work well as a replacement.
They’re a bit rare and hard to find but I’ve found a place that sells them for 23 bucks, shipped, internationally. By the time you buy an $18 dollar adapter and spend anywhere from 4-8 bucks for an S.N.E.S. controller you’re pretty close to that mark, if not over once you factor in shipping. Granted nothing’s more authentic than the real thing. However if total authenticity’s of any concern for me, I have a real S.N.E.S. with over seventy game cartridges, so your millage may vary on that. The Retrolink’s also much better priced than the Super Smartjoy A.T.M. which I was looking for for some time before SLS controllers hit the market.
I’ve also seen that Buffalo branded Famicom clone controllers. I’d consider getting some but I don’t really have that good of a reason to, since I already have a small handful of Saturn SLS controllers.
If on a budget, I’ve heard generally good reviews about some of Tomee’s products, which only cost a couple cents more than the Retro Motion one you linked. Most notably it concave X and Y buttons, like the original NoA SNES controller. People do argue about whether it’s more like an authentic SNES controller or one of the rather convincing but inferior counterfits that was on the market however. Videos I’ve seen of the buttons make them look proportionally smaller to the controller than what I’ve seen. You’ll see a link to the Tomee on amazon in the related links and it only costs a couple of cents more. It also has plastic buttons.
Speaking of which, if you do use an adapter, don’t buy “New” S.N.E.S. minis or S.N.E.S. controllers in the box unless you know what the fudge you’re doing and preferably, buy anything you get in person if you can. There have been very professional looking counterfits on the market.
Edit: Mixed up which controller had plastic buttons. A small amount of additional information regarding my choice of SLS controllers over Buffalo controllers. Felt I should reference the Super Smartjoy somehow…