Been wanting a NES for a minute. Decided on buying myself a toploading unit for my 40th birthday this year. The American NES toploaders were too pricey, but the Famicom AV was much more affordable and with the bonus of AV instead of RF only like the US model. Just by coincidence I bought Mario Bros as my first Famicom game since that was the cheapest, best quality game I could afford and it just seemed right to make it the first Famicom game I owned. But after I purchased it it dawned on me that it was delightfully appropriate to buy Mario Bros on it's 40th anniversary as my 40th birthday present this year :D
Looking forward to grabbing an Everdrive when I have the cash and really getting down and dirty with it. I have a whole bunch of homebrew and hacks I'm itching to play.
Game Genie had a thicker circuit board than a game cart, to get a good connection in the frontloaders. The toploader's cart slot is pretty tight, to get a good connection. Combine these, and it feels like the cart slot is going to pull off of the circuit board before the Game Genie lets loose. Everdrive/Powerpak would work fine.
Galoob offered an adapter for the toploaders but they are extremely rare.
Honestly, even a Trinitron TV with composite looks as good as RGB at the resolution of NES.