WOW! Some of the best historical fiction I have ever read. Centurion Lucian Tullus was a fantastic character. Unfortunately my library has a limited selection of Ben Kane.

What other Roman sagas would you recommend?

I read my first Ben Kane book a few weeks ago "Eagles in the Storm" and really enjoyed it.   In his epilogue he mentioned Christian Cameron as an inspiration.

I just finished "Killer of Men" (Long War series) by Cameron and really enjoy his writing style.  This is the first of 7 books in this series of his and I'm looking forward to reading more.

I got the first three books of this Long War series on Amazon for a couple of dollars, well worth the money.

Conn Iggulden has an amazing series about Rome.. Julius Caesar era and after... as well as other historical fiction set in Greece and Mongolia

Simon Scarrow and Adrian Goldsworthy both have long running series set in Brittanic Rome. These are more Bernard Cornwell-style than hard history, so take that into consideration if it's not to your liking.