Heh I managed to get my hands on a 24-70 2.8 i. That should suffice if not yeah the 24-70 4is sounds good!
Wrt using it more.. Isnt that always a problem for hobbyists? Everyday I look at my dry cabinet and I wish I had a day off every month for each of my cameras and lenses.
It's normal and I felt that too. Ever since I attached and now married, I've even lesser time for photography and all my equipment and batts have not been used for over half a year, some over a year.