I also have a 2001 Sheraton in Natural finish, made by Samick. I owned an ebony but sold it because it weighed a ton. It was a Saien manufacture. I also own a 1990 Ebony ES 335 and this guitar is abolutely amazing. The Sheraton is a very close second in tone, but it is a much nicer neck feel than the ES.
My Ebony sheraton was a special edition and had a White pearl pickguard and truss rod cover. It looked really sweet with the gold and triple binding but it had to weigh 3 pounds more than the Natural.
Nice guitars and I bet she sound amazing with the 57s.