If you are looking for floating tremolo equipped versatile guitar with spectacular acoustic sounds I´d look no further than:
Graph Tech LB63 Ghost (Piezo-loaded Floating tremolo)
- LB63 is a drop-in replacement for OFR and OFR license bridges - So if you want to upgrade your existing guitar, it is possible too.
- 6-string guitars only
- Color options: Chrome, Black, Gold
Otherwise I would go with the industry standard, which is also available for 7-string guitar:
Original Floyd Rose