The Excel/ XLS and X work the hardest. At least the Excel/ XLS gets extra pay due to the differences pay ($225 a month for SIC). The Excel will get you the most pay as a new FO with the differences pay and a lot of overtime. I've heard that the Hawker 800 (with the Collins) will get differences pay and fly the 900s when we start getting them this fall. The Hawkers are pretty senior for CAs since they supposedly have a fairly light schedule without being so light that you are sitting hot standby all that much. I haven't talked to any G200 FOs, but we are getting 6 new ones this year so there will be some slots available. Good luck.