Over the weekend I went around to several dealers looking at different 5"-6" discs. There is a pretty good gap in prices amongst the different brands. What I noticed however was the more expensive discs seemed to have sealed bearing whereas the others had cast iron bearings with grease fittings. I figured the greaseable bearing would be better especially since I could keep it nice and greased, but the dealers claim the sealed is better. My granddad's disc still has the original greaseable bearings and it is over 30 years old. Any experiences with the two? preferences? I just want the best bang for the buck.