I agree with the notion that the GS1ks are more of a "different" Grado sound than a flagship type sound. I will admit that they have grown on me and I actually am enjoying them quite a bit, but I still give the edge to the 500s. I love that you were firing up some vinyl, Stacker....I've been in the research phase of an analog system since I've never had one...it's really been an education. I'm hoping to add a vinyl source here in the coming months, and a big part of the reason why is because Grado's cartridges are arguably better than even their headphones....so I'd love to have another excuse to send them some money. I'm not all that close to pulling the trigger yet, but I enjoy reading about those who are pairing vinyl and headphones....especially Grados :)
Be carefull Focker!,that vinyl thing can be very addictive,a good vinyl on a properly ajusted TT can be a jaw dropping experience through headphones,case in point,the first time i dropped the needle on Eric Clapton's Unplugged LP,on my Technics SL-1200 MK2/Ortofon 2MBlack,i have the CD and the DVD of that concert and the vinyl tramples them both,it has a wider and deeper soundstage,an almost pitch black background and this 'organic' sound that only vinyl can give you.
Fortunately it doesn't have to be expensive,especially if like me,you decide to go the vintage route.Aside from my Technics wich i bought new,i have bought three mint vintage turntables for less than $700,yes,that means i have four,see how addictive it can be?.I have a Yamaha YP-D6/Audio- Technica At95e and two Marantzs a 6300/AT-95e and a 6350Q/Ortofon 2MBlue.
As you can see i don't have Grado cartriges,it's not because i don't like them,to tell you the truth,i've never heard one,it's simply because when i first got interrested in vinyl,the salesman suggested i'd go with Ortofon.I then discovered the $50 Audio-Technica AT95e,wich is regarded by many as one of the best buys among cartriges and with good reasons,this thing sounds wonderfull.
Sorry for rambling on like that,but it could have been worse i could've bored you with my passion for Reel to Reel tape recorders,don't get me started