I started my optics crusade with the typical crap optics; NCStar, Leapers and other cheap Chinese crap. Definitely not worth it for any firearm. Then I picked up a used 10x40 Super Sniper (by Tasco at the time) and was pleased with it. Still looking for variable power, I tried the "higher end" Chinese stuff (Millet - yes, it's Chinese) - and had marginally better luck, but still not something to count on. For under $500, your options for a GOOD, RELIABLE variable power optic are very limited. Bushnell Elite [series], and Vortex are good names. Jumping up to the $1K ceiling, you open yourself up to some MUCH better options and if I could do it all over again, I would save up until I moved into this $1K budget category. One big benefit of the higher cost optics is that they hold resale value really well. In the under $1K range, look for Trijicon AccuPoint, ACOG, Vortex PST's (variable-power FFP is an option now under $1K!), and if you're lucky you can find a used Nightforce 1-4x24 or maybe a 2.5-10x24 in this range. For the under $2K, Nightforce NXS and US Optics are primo.