The Pediatric Critical Care Study Guide by Lucking - more accessible and useful for a quick scan than Fuhrman or Rogers and only like $60
If that e-fund money is burning a hole in your pocket, it's not bad to have either Fuhrman or Rogers. In general I like Fuhrman better than Rogers, but truthfully they each have strong and weak chapters, so hard to pick one.
The Pediatric Cardiac Intensive Care Handbook is available from the PCICS for $40 plus shipping. It's extremely useful and is small enough to be in a coat pocket.
I loved the Illustrated Field Guide to Congenital Heart Diesease and Repair...until I lost it, which was seriously a really bad day. Was out of print for a while and hard to find, looks like it's more readily available at the moment. Not doing hearts anymore, but this would be my go to pick up if I changed jobs.
The Pediatric Cardiac Surgery book by Mavroudis and Backer is really well done and helpful to understand in more detail the operative planning and details if that is something that you think knowing that stuff would help.