h2oyo,
In their literature, Yamaha calls front height speakers "Presence speakers" and I experimented with this feature on an older Yamaha AVR (RX-V659) as I transitioned from wall mounted bookshelfs to towers.
- I did not find presence speakers compelling enough to keep them as part of my theater system - YMMV.
- FWIW: Yamaha Presence is a DSP artifically created sound channel, not resident on the source material (DVD, Bluray, Dolby, DTS, etc.)--unlike what will eventually exist for Dolby Atmos (and other equivalents).
If you already have the extra speakers, give it a try; if not, I would not recommed spending a whole lot to investigate Presence.
Cheers,
XEagledriver