I have a Bushnell AR Optics LVPO and like it quite a bit. No experience with the 4500, but I have read some good things about them.
Where I am. I have the AR Optics that tops out at 8x. Get over 6x and it is very hard to stay behind. I wish I had stayed with the version that tops out at 6x.
No help on the 4500 but I am not at all disappointed in the brightness and clarity of the cheaper AR Optic.
I wouldn't be scared of the 4500 at all.