Thanks guys for the input!!
To: Chris_Himself
I've never heard of the upgrade, but I was browsing through the Symphones website and they do a sr325 upgrade for $399 (I assume this is what you are talking about) because I couldn't find just the drivers alone, maybe if I contact the company. But is $399 worth it? I've been reading their description on the upgrade and to my understanding they change the drivers' material to all aluminum, apply their proprietary coating (I assume this is the glue that holds the drivers to the chambers), and they get cleaned. I mean I could almost buy a brand new pair of PS500s with that!! so I'm very skeptical.
Also, since I see you own a pair, is the change that dramatic? I'm very intrigued now since this seems to be an up-and-coming company and if it provides a quality product it might be as big as Ray Samuels Audio. I haven't read all of the comments on these Grado upgrades, but it sure seems like a neat upgrade if it delivers LCD-2-notch sound, even though I've never heard a LCD-2 
To: San_Raal
Thanks for your great input first of all. I have read before that the PS1000 is a league of its own and it is great to confirm their similar performance to the PS1000. Hopefully one day I can hear them, but for now the PS500 are in my reach and if they sound as good as the top notch PS1000, then I might go for them. Grado is making a lot of hype about them, even if you go to their website they automatically pop up and are even giving them away as sweepstakes on facebook as a marketing tool.
From your pointers on enhanced detail retrieval, tight bass, and fantastic mids, I think the PS500 and I could be a great pair. I listen to a lot of indie rock and folk music, so these words are right up my alley!
To: bbophead
Great review! It's nice to hear a simple and direct review without all the mumbo-jumbo over-the-top diction that most users like to use when reviewing a pair of HP or maybe I just need to educate myself with some sound engineering vocabulary. Anyways, I got from your review that you were satisfied with your purchase, but you used the word "little" a lot, which signals that there was a small improvement from your sr-325s. I mean obviously there's a point on high end headphones when the ratio of improvement to price gets very low as you go up this curve.
So as stereotypical and head-fi newbie as I might sound, was the improvement worth it?
On the head-fi meet note, I would love to attend. As a Texas resident, I had given up a while back on finding a meet, so it's great that there's more interest now! 
Edited by blackwolf05 - 12/23/11 at 8:43pm