I have the SR80is, and I'll be getting the PS500s any day now. The RS1s are basically what the sr80s strive to be, at least that's what everyone says. So I'll be going from an aggressive grado signature, to a much more balanced signature, though everyone says the PS500s still retain the grado sound, just not the bright highs.
Honestly that's the main draw of the PS500s to me. At times, possibly when I'm drinking too much, and I'm listening to more modern music, I really like to feel the impact of alot of the newer stuff. Yes, I will listen to lady gaga upon occasion, maybe even a (oh no he didnnnnn) rap song... Only when drinking. Anyways I find that I often have to turn the music up to hear what I know is in the music, and I can tell that the highs really are starting to impact my long term hearing. It's worth 600 bucks I completely do not have for headphones to keep my hearing good while I'm young, and still be able to listen to music like I want to.
Anyways, long post, but that's my rationale. I'm pretty sure the PS500s will pretty much be my dream can, and the only thing from now on will be save up the 3k from the Woo 5-LE, then another k for the tube upgrades, then another k for a good dac, then another k for good cd/vinyl players.... So I'm not out of the woods quite yet, in fact I'm about 10% in, but we will see here in a few days.
By the way, I ordered from grado's 4yourears site, and I don't recommend it. If you order from Woo, same price, and you get a free headphone stand that looks nice. 4yourears is taking forever to ship them to me. They gave me a tracking number, and marked the order shipped, but usps hasn't received the package yet, which makes me sad. I guess they printed the label off and never took it to the post office, and here I am 5 days later
I'll call them tomorrow and yell at them some. I don't mind paying full price and getting no kickback, because I enjoy paying full price for great things, but at least they could ship them when they say they will.
Oops, didn't mean to rant quite like that. Sorry.