I can either buy EZ Flash IV or Reform. I already have R4 for DS games but still looking for something to play GBA games comfortably. I could also buy Supercard but its pretty shitty from what I heard(so its much cheaper even than this one)
I think that EZ Reform is basically an EZ flash IV with a smaller/replaceable case. Supercards only have better DS game compatibility; they are worse when it comes to GBA games.