Looking for a 7 string as well, probably going with the Schecter C-7 Hellraiser, or the ESP LTD H-307.
I like the Xiphos, but I don't really like the extra thin Ibanez necks.
Still looking for a 7 string, and preferably without a trem. Anyone have any suggestions? I'd probably get it used or something, I don't like most of this year's models.