A good D/A is gonna cost around $200 give or take.I have had alot of them,but the Dynabrade one's are the best.I have two I use now.A 3/16 orbit for rough/dry sanding and a 3/32 orbit for wet sanding.Don't bother with the vacume or integrated wet ones,there all useless,you'll just end up useing a regular one.USA Tools usually have them on there trucks.