do you guys have any recommendation on a 20X-60X 60mm or 70mm spotting scope with baK-4 prisms ? my budget is around $250 usd. at the moment, i m really interested in getting this http://www.opticsplanet.net/meade-20x-60x-redtail-70mm-spotting-scope.html will there be something better than that one within my budget?