To whipple or not to whipple? What is quality of life like after?

Am 56 years old in generally good health, though with type 2 diabetes. Have a very large (41mm) adenoma in my duodenum. It's not malignant but is of a type that will almost certainly become malignant, it will eventually block my duodenum. I also have abnormal cells in the bulb of my duodenum, so endoscopic removal is not an option. Surgeon is suggesting a full Whipple, without preserving the pylorus. Realize that I'm blessed that things are pre-malignant but also didn't have a Whipple on my bingo card at this point in my life. Whole process has moved very quickly - started with anemia in mid-October and am looking at a potential surgery date in January. Would appreciate anyone's perspective on living with a Whipple and on quality-of-life post recovery.