IIRC the MS2's are based on the Grado 325i's. I LOVED my 325i's. I only sold them because I like the HF2 a bit better. Per Wid's rec a while back, I tried the Grados in order to find an Axiom-like sound.

I did try my friend's HD650 but it needs a proper amp (which he didn't have).

I haven't listened to AKG701's but from my research, the sound is different.

So yes, you'll want to demo to let your ears decide.