You obviously know what you're doing
This is a perfect example of different people needing different clubs, depending on their swing/ball flight.
It's clear you know exactly what you need, so 'carry on'! :thumbsup: As you say, the bigger heads tend to hit the ball higher. Let me know how the 905R works for you.
As for me, I have used Callaway Big Bertha (long time ago), Titleist 975 (I forget whether it was the D or J), TM 320, TM 580 and now the Ping G2. But I have always looked for MORE height and carry.
There is a pro shop nearby that has started to carry the top driver heads with removable shafts. So I can try all the major brands in different lofts, WITH DIFFERENT SHAFTS. For me, the shaft is just as, if not more, important than the head. So my next driver purchase will be much more scientific than in the past. Can't wait. It will probably have to wait until next year though, as I still really like my driver. Plus, I have already put in a new hybrid and new putter in my bag this spring.