I realize the GS-1000 isn't a slam dunk. The RS-1 kind of is because it gives that "in you face" presence and energy that no phone really matches.
The GS-1000 is kind of amazing and strange at the same time. It took months of listening and comparing to get me to decide that I really like them long term.
I've compared the RS-1 with the GS-1000 over and over again for months and realize that while the RS-1 gives the raw energy, it sounds smeared, shouty, has an anemic soundstage, and after awhile its tricks become old (matching the GS-1000 only in timbre). In the end, the GS-1000 always comes out the better technically (for me). I know I'll get flack for this, but owning and comparing both for months give me confidence - also the fact that the designer of the RS-1 calling the GS-1000 his statement product reinforces that I'm on target here.
The high frequency spike is my biggest issue. The bass can make things sound congested at times, but not the worst trade off for the wonderful impact and tightness the bass has to offer. The RA-1 softens the highs well BTW. So, does my PPX.
All that being said, the GS-1000 soundstage is wonderful - it is musical and romantic while being as neutrally balanced as any of John's phones (not the last word in neutral however). The best part is the timbre that only wood phones can give you. It only suffers from digitally processed recordings - which is the fault of the recording not the GS-1000s. For acoustic instruments with no trickery, it sounds amazingly real.
The biggest thing that put these phones in my top 3 is that after hearing them, the (Senn HD600, AKG K701, and RS-1’s and almost all other phones just become less interesting to me. I always want to go back to the GS-1000s. The only 2 phones that compelled me not to are the HP-2s and K-1000s (which get out of the way of the recording like no other phones) - and even at times with these, I craved the colored, romantic sound of the GS-1000s. They aren't perfect, but nothing gives me what they can.
Good luck - and feel free to hate them if they don't work. I'll be keeping mine.