I think steel would be fine, but are you going to be looking for .03 second down the road and wish you spent double on an aluminum, CF, or cromoly? I put steel in both of my cars and although I'm still a skeptic, sometimes I wish I spent extra for something lighter. I got one from dennys and one from a local shop. From what I remember dennys had a crazy wait and last time I checked I couldn't believe how much the prices went up. I want to say the local guy was like 450 but he sent me home with slip yoke and drive flange to measure with, he had it ready the next day. 450 was with slip yoke and drive flange for the 8.8 rear.

Try cj tattons or tattons driveshafts. He sells on eBay but might have website, you can call him. I've used him for jeeps before and had no issues. I couldn't find cheaper. Pretty fast too. He's mostly jeep and 4x4 but I want to say the jeep stuff is super finicky with driveline vibes.