I just picked up a new Glock 19 the other day and wanted to put some night sights on it. After doing some research I narrowed my choice down to the Truglo TFO and Trijicon night sights. I finally decided on the Trijicon night sights but being new to the gun world, I am not sure what a good price for these are and where to buy them. I would also like input as to if you really need to intallation tools that are being sold to install these sights. I have read that people have needed them and others say that they installed the sights fine without this tool. What are your opinions? Thanks!