I dont know about sights. But are you getting the full size or compact .45? I loved the comapct .45 and was so close to buying it. I opted on the .40 just for the thinner slide and slightly smaller size. With all the .45 ammo I had at the time I should have just bought it and my gock light would have fit.
If what I read is correct you should have no problems with your won loads. The only advice I can give you is get night sights. I dont know what I ever did without them. I am dying to get some on mine.