I fly T/W for a living. Practicality would indicate that you should get some experience in a C210 or C206 or even C182, as that will be what you most likely be flying in your early career.
If you want to learn about ground handling and X-winds etc, then by all means, do your T/W endorsement. You won't regret it.
Don't expect to be able to get into the bigger T/W machines after doing an endorsement in a Citabtria, well not straight away. They are different altogether.
PM me if you want some contacts for advanced T/W training.
regards,
185.