To answer the OP question:
From a financial standpoint - If I had to turn in my '12 truck which is already paid for I would not purchase the same brand of truck.
From a Safety standpoint - I will not offer that advice nor should you take anyone's from this forum either. I think you answered you own question in your original concern.
BTW... Don't let others confuse reliability issues with safety issues. The safety issue is a the top of all attributes by a long shot and anyone who knowingly put peoples safety at stake should deal with criminal charges.
I thought I would add more: Our family farm/ranch business has a 07 Dodge RAM 3500 DRW. Even though this truck is not included in this recall I'm paying close attention to what's the real issue here. This truck is mainly used to pull a gooseneck cattle trailer towing mostly cattle and our horses.
I'm not sure what differentiates a 07 from a 08 truck that's included in the recall.