Spotting Scope Advice

I am looking for a good spotting scope for under $500 or close too it. I know, I know spend more to get better quality. Well I am a college student and don't have the extra money to spend. I need one mainly for hunting in south Texas over large fields. What do y'all think is my best option?

I have a Leupold Ventana 20-60x80 that will be in your budget. I like it pretty well, have looked at deer at 700+yards with very good results. I don't foresee needing anything beyond its capabilities for hunting in TX.

Best bang for the buck imo.

http://www.vanguardworld.us/hunting_us/products/spotting-scopes/endeavor-hd-65a.html

I have an extra if your interested