I got my ticket when they first became available thanks to a work mate I'm going with. I'm in the stalls on one side too.
I think you'll find your seats are fine really, if you're in the stalls along the edge of the 'Arena' area in the middle then I believe those seats swivel so you can face the front, but you'll also be in a better position to take in a view of the entire hall and orchaestra. As the performance of the score is really the unique factor for me at least I'd rather be higher up for a view out across the entire venue, it's a beatutiful building.
(If it were just a screening of the film I'd prefer to be somewhere in the middle though!)
I'm really looking forward to this, particularly as I missed the 'Jaws' performance last October.
