Here is the BJCP
http://www.bjcp.org/2008styles/style10.php
guidelines for an APA.
Vital Statistics: OG: 1.045 – 1.060
IBUs: 30 – 45 FG: 1.010 – 1.015
SRM: 5 – 14 ABV: 4.5 – 6.2%
So you are within the style for IBU. Slightly out on the OG. Should be fine leaving it alone or increasing the IBU a bit.
Like KC mentioned, make as is. Then make a change on the next batch if you feel it needs something.
As for the orange, in each glass is a good idea.
If you wanted the whole batch flavored, start with mixing a single glass to taste. Then scale up.
Remember that there is some sugars in the orange juice. So you need to let that ferment out before bottling or you risk bottle bombs.
Kegging, add the juice and use the ‘set it and forget it’ carbonation process.