All I know is that many Vortex model's glass quality is just as good as Leupold VX3. BUT ...for much less money.
Then you throw in that amazing warranty, and it's a no brainer. Below is the warranty description that I copied and pasted here straight from their web site. It can't be beat.
Our warranty is about you, not us. It's about taking care of you after the sale. We will repair or replace your Vortex product in the event it becomes damaged or defectiveóat no charge to you. It doesn't matter how it happened, whose fault it was, or where you purchased it.
- Unlimited, unconditional lifetime warranty
- Fully transferable
- No warranty card to fill out.
- No receipt needed to hang on to.
If you ever have a problem, no matter the cost, we promise to take care of you. The VIP warranty does not cover loss, theft or deliberate damage to the product...that's it.