I want to replace the sights on my G17. I think I have decided on Truglo TFO's. I can get them locally and they will install them while I wait at no charge. I have done a ton of research and I have held them in my hand. I still cant decide if I want all green or green in the front and yellow in the rear. I use this gun for USPSA, steel shoots and fun at the range. My shooting is spilt 50-50 outside and at an indoor range that has bad lighting at best. What do all of you think I should do? I will be working within a few miles of where I am going to buy them Tuesday and Wednesday. I want to get them one of those days. I have an indoor USPSA match a week from Thursday and I would like to shoot with them at least one time before my match. Any help you guys can give me would be great. I have trouble spending $100 on sights but hay there good for +10 years.