When I built my Spectrum touring bike, I was not going to part with my beloved Kirtland handlebar bag, so I have a set of Profile Split Second bars mounted right alongside the handlebar bag --just enough clearance to get the bag on and off.
This gives a bit wider spread than normal aerobars, but the benefit is still there.
My particular set up does basically eliminate the top of handlebar riding position. To reduce this as an issue, you might consider a slightly (1-2cm?) wider handlebar to give more room on the tops --assuming that extra width does not cause a probem for you when riding the hoods/drops.