I'm just a audiophile newbie so haven't gotten any amps yet. I just use the Poweramp music player on my Samsung Galaxy.
My Sonorous and PSB don't really need amps to sound off the wall, I think by default they are pretty amazing.
I listened to the Grados more and I'm loving them more and more. They have such a friendly and warm sound that pulls you in gradually, it just leaves you wanting more. I don't think the RS1s are worth $700 though, as good as they are. I'm definitely thinking of getting amps just for these Grados.
Thanks for the link too
I'm curious to know if you have an RS1 with the famed buttons. The further down the audiophile rabbit hole you go, the better your RS1 will sound in scale.