How do you see this working? A section like the one for magic items? Don't you think that musical instruments are too uncommon to have a special place reserved for them? Then I might as well add a special place for foci, armor, and weapons, leaving very little space for equipment for anybody that only wants to use the first two pages.
Athinar, I'm not sure what you mean with adding skills to the equipment list (or exactly what you mean by your post if it is not the same as what Ohillion is talking about).
I see your point. Too much is too much. Having an all encompassing equipment list should suffice. However, if you choose to do it, I can see taking the EXP section and move it to the upper left of the first page and tieing it to the right of the Level box. Label the new section that you created space for as Professional Gear/Items (Bard/Rogue/Priest is a profession as much as it is a Class) so you don't have to add the litany of options. It's up to the player to add those items in manually. And, you can tie the weight calculation in to the overall encumberance chart. Our game group has players that always keep a handy supply of professional gear (lock picks, instruments, holy symbol, etc. Your player shouldn't leave home without these!) and that can easily be tracked here. The more mundane adventuring gear is already established and doesn't need to change.
As for space concerns, it looks as though there's ample space between the alignment line and Abilities section to maneuver. In fact, making the EXP and Level box connect is a decent option, IMHO. Move the 'Dungeons & Dragons' image up to bring it in line with the Level box. Drop the Name, Class, Backround lines below the Level box, and then to the right of that, move the Height, Hair, Alignment, etc lines. That would fill out page one quite nicely. Even your Companion page doesn't have as much space beneath this field. Stylistically, I don't know why EXP is on the bottom left of page 2. Seems odd to me when the Level box is the first thing you see on page 1 and EXP directly impacts that.
This, of course, is my opinion. And yes, I know it'll create more work for the sole sake of adding a 'Professional Gear/Items' field. So with all the being said, do or do not. I leave it up to you. You've already created what I consider a masterful piece of work.