Old A's for flatland, so much easier to use. But umm, pro mods are stronger, but I just like the feeling of an Old A better. It's your choice though man, go with what you like.
i like dropouts, but the feel of old a decks. while going through yard sales looking for a sprocket for my bike (which i gave up on and im getting a WTP reason or fit AM), i found a "yaak." its the exact same size as an old A, its stronger, it has dropouts, and ITS PURPLE!!!
i voted for old A b/c im awesome.