Hi I'm new to the audiophile world. My first pair of audiophile headphones are currently 325is's and just like u I fell in love with them. I'm thinking of getting the rs1i next year as my upgrade.
Congrats, you have got yourself a great headphone.
I use to own one, and I just loved it....I was scared at first ,as most described it as too bright.....I did not find it that way at all.
I took the same upgrade path that you are thinking and personally I think you have a great plan
On a side note.....I listened to my AKG Q701 yesterday for about 5-6 hours......It is harder to drive than the rS1i, but the MAD EAR +HD handles it easily....I just had to turn the volume dial up to about 12 oclock.
The Q701 is a very nice sounding headphone, no doubt.....I quite enjoyed it yesterday.
This morning I plugged my RS1i back in and in just 10 minutes time....I was smiling....foot tapping. Had to turn the amp down , of course.
I know that many say Grado's lack bass, but IMHO the RS1i has it nailed!
Damn, this bass is in no way boomy, or muddy, nor do you feel it....nor does it muddy up the mids, which is usually what I find a headphone with more bass does.
The bass is fast, tight, clean and it leaves everything else alone. This headphone is just plain fast, and of course what I like best...the guitars....oh the guitars.
In no way am I knocking the Q701....I do like it.....but it lacks in every department to me to the RS1i, except the soundstage....the Q701 has a very wide soundstage, but I am not a huge fan of a wide soundstage.
Note, that I only listened to rock and blues for the most part.