I've been using an RS60 for a while now, probably three months at this point. Have it with MX Blacks and PBT keycaps, and it feels great. The mods don't sound perfect, but getting hung up on stuff like that has always seemed a bit silly, especially when you rarely ever use them compared to the alphas. I definitely understand all the hype behind top-mounted blacks at this point, though - there's just something special about the combo even if it isn't realistically the "best" in any way.
My other daily-use board is an FC660c. I've been looking for a metal housing for it, but it just seems a bit overkill, especially when all the other mods I've done have specifically been to get the board as silent as possible. And there's just something special about a Topre board in the OEM plastic housing, anyways.