The RAMA M60-a was my first premium and HHKB style keyboard. Also, it was the first time I owned a keyboard with a brass weight. Originally, I bought the moon version (gray) but, while gray compliments a ton of keycap sets, it is also a little boring. I ended up trading my slightly used Moon RAMA M60-a for a brand new sage version.
The board is plenty heavy but I thought it should have a more premium feel to it. So I decided to buy an internal aluminum weight from RAMA, which resulted in the board weighing roughly 5 pounds.