This is a good lens to use too. I have this lens also, but I used the 60mm more because my clients prefer the traditional look (short DOF selective focus). Sometimes it is not what you wants but who pays your bills.
Perhaps you could try a tilt/shift lens? It would give you ultimate control over your DOF. If you want to get one cheaply you can try looking for a Hartblei Super rotator. If you have the budget perhaps a canon 45/2.8 tilt/shift would serve you well too.