Giants is the sensible and logical choice but Wigan would be the braver choice.
Wigan are the biggest threat to you winning the GF by far so do you/should you try and take them out with home advantage? Surely you have a better chance of beating them at home with the emotion of the last ever game at Knowsley Road than on neutral territory?
Sure there'd be a risk that they could knock you out but if you beat them your chances of lifting the trophy suddenly increase massiveley
with their injuries I think Giants could beat Leeds and even if Leeds got through i think you'd get your revenge this time