Thought I’d post my rambling thoughts on RikuBuds Grand Saber 2 - got them a wee while ago, life/work gets in the way sometimes. First just a shout-out to @Rikudou_Goku he’s great to deal with, and orders get here (UK) quickly - bonus!
So I had my first foray into buds with the Saber 1s (I’ll shorten this to S1s) - and I thought they were excellent for parts of my library. Caught the tagline for the Grand Saber 2 (GS2s) further up in the thread “Great for R&B, Hip-Hop, Metal/Rock” and jumped to order a set.
My library is mostly metal/rock - so are they great for it - imho hell yes (mostly - I’ll come to this in a bit). First on comfort/fit - the GS2s have the Val39 shell and I find them even more comfortable than the MX500 shells on the S1s, which for me are also really comfortable. There doesn’t look to be much difference, but my ears appear to think differently. As for the sound, two things that struck me straightaway was the bass, it sounds lush and full but also really clean (tried my cackhanded best to A/B with the S1s to put this in some sort of context) - even to my pretty poor ears there’s a difference between the two. The second is the sense of stage/space - and I don’t know if this is the correct term or not but they just sound really dynamic. Ok, this is three things but they have the fab timbre I also loved about the S1s. Wow does Lacuna Coil’s Comalies XX sound good on these - I swear I had Swamped on constant repeat for about 40 mins.
The treble is warm/dark sounding so for example cymbal strikes can take a step back - they are still there although tbh it was never a big issue as my attention was always drawn back to kick drums/toms sounding so good - like on Slipknot’s (Sic). Great for long listening sessions as no fatigue plus the comfort means I forget I have them in.
The “mostly” reference above only relates to some female vocals on some tracks just sounding a touch recessed (to my ears), but overall the GS2s are damn good and work with much more of my library. (Only one problem - now I’m looking at you next Grand Alter Saber 2 
).