I have a Burris ff e1, vortex crossfire ii, vx-1, bushnell elite 3200, weaver grand slam, redfield revenge, Nikon buckmaster, and a bushnell xlt.
All of these were purchased new and under $200, most on sale.
All of them are serviceable or at least have been so far.
The fullfield e1, vx-1, and bushnell elite 3200 are my favorites. The vx-1 has the best eye relief and they stand behind their products . I have heard some horror stories about Burris customer service.
The Nikon and bushnell xlt are my least but they also each cost less than $100. The redfield revenge is mediocre compared to the rest.
I will say from my limited experience to skip the cheap bushnells, Simmons, tasco, and utg.
Forgot to add: I purchased the weaver on a whim recently because it was on sale. It will be mounted on another Howa 1500 I have coming in. So even though the clarity and definition seems good on it I can't honestly compare it with anything fairly. It has made in Japan stamped on it though which is a good sign I suppose.