Choose between PwC Tech, IBM CbD, or Accenture Strategy?

Hi everyone! I recently got offers to join PwC's Tech Advisory (probably in IT Strategy), IBM's CbD Program for Business Analytics, and Accenture Strategy and I'm trying to get a better sense of how these compare in terms of type of work, exit opportunities and prestige. I'm also concerned that tech would lead to a pigeon-holed career, something I'm considering for both PwC and IBM (I've also heard that IBM is more about IT implementation than business strategy). My long term goal would be to work on projects related to energy, utilities/power and sustainability. I really value your experienced input. Thank you!