Hi welcome along. I have a 320d 03 plate with 115k on the clock. Also I got paranoid about swirl flaps, but a bit or further reading, its just paranoia. But they will cost under £20 to replace if you do it yourself, not a hard job if your good with tools. As for turbo, just good, regular services should keep it winding.. Go for it mate, the 2l diesel engine with 150 horses pulls like a train, I was very supprised. Lots of torque too. Lets us know if you decide to go for it.