Recommendations for arm for Oracle Delphi mkII?

Does anyone have any suggestions for arms for the Oracle? I purchased a used Delphi mk II last winter that came w/ a Grace 707 9" arm, and am thinking of replacing w/ something newer/more evolved engineering/better wiring... and more musical. Thoughts on one piece pivot vs air bearing in this application? If pivot, 9 vs 10" lengths?
SME Mark IV works well with the MkII. Provides a bit of bottom lacking in the Oracle. Be sure you have the Brooks Berdan mods done to get the best out of the table. I have this setup with a Sumiko Blackbird. Fabulous. Good luck.