I have a Leupold Mark IV 12-40 spotter with reticle that I like very much. It has very good eye relief, compact design, rugged, lightweight, and good image quality up to 30 power. Image degrades significantly past 30 power but I am often shooting at long range with heavy mirage. I got a good deal on mine for $1300 new. They make the Golden Ring that is closer to your budget, similar scope but no reticle.
Not trying to be rude my friend but a MK4 spotter (M151) is the last one I would recommend if they want better glass. Don't get me wrong, if you want an extremely tough scope it's the first one on my list. I had one several years back on a deployment to Iraq that it seemed at least once a week somebody would ask to look through it...and then drop it! It was ever ran over by a 16,000lb tactical vehicle in gravel and it just got a couple cosmetic scratches an lived through a large IED that destroyed my HMMWV. The FFP reticle is nice for calling corrections (direct or indirect fire) but ranging with a spotter isn't that easy. Easier to do with the rifle scope's reticle. I have 6 of the signed out to me. For observation purposes, we would rather use the M144 spotters (B&L 15-45x60). It's glass is quite a bit better at higher magnification. My personal hunting spotter is a Nikon XL II and it has better glass as well. These two cost a substantial amount less then the Leupold!
I can't recommend which one to buy, I'm looking to upgrade as well after my rifle project is finished. I can give some advise on what I do have a lot of experience with.