S4K/S4K PRO & XDCAM

[Kilroy]

Hi everyone...I'm new to the user group, so be gentle (smile). We're overdue for an upgrade at my church...I currently use the Classic Cassie to edit and have 3 Sony DSR-250's. I'm beginning to lay the groundwork for an HD upgrade, and will start with the editor. I'm looking at the S4K and the s4K Pro, but am wondering whether they're compatible to the XDCAM 330, XDCAM 700, or any of the Sony professional video card models. I'm leaning towards the disc versions, but want to make sure I don't have a compatibility issue if we buy either of the S4K's. Can anyone help? All input would be appreciated...thanks!