I've just ordered a HHA Ultra Lite bow sight with all the frills on it including 4X lens. I bought the standard rectacle should I have gotten the bigger one 2"?
First off, congrats. The Lite Ultra is a great sight. As for the scope size, it's all personal preference. I shoot the 1 5/8" and love it. If for some reason you don't like yours you can always order a 2" and swap it out.
I bought theXL-5519 with the 2" and kind of wish I got the 1-5/8" housing. I like it a lot, but my old MBG single pin was the smaller size and I think I liked that better. The HHA is awesome I am just saying I think I liked the smaller housing better that was on my MBG.