Quality is determined by the grade and type of pigments, resins, and how much water is in the can. Don't just buy a big name brand and think you are getting a good product. Every manufacturer makes an inexpensive paint. A well known manufacturers name on the label does not necessarily mean that it is a good product. They have to provide for all markets. Stick with the medium and top of the line grades. It really pays to buy a good brush. A decent 100% black nylon 3" brush will save you a lot of grief. Wash it well when finished, wrap it and it will last forever. Polyester roller covers pack down and do not hold paint; you will be reloading your roller forever. Buy a good quality blend or better yet, a lambskin cover. Lambskin covers hold more paint and are less likely to leave "roller track marks". Buy a decent cage roller frame, quality cover and a 4' wood extension pole that you can screw into the handle so that you can roll ceilings and walls from the floor. Wall Scrapers, Putty knives, Caulking gun, Wire Brush, 5 gallon empty pail & Roller Grid, 1-2 gallon work pots (for brush work), Disposable Coveralls, Spray or power, painters specialty paint pads, Ladders, Scaffolds, Basic hand tools like screwdrivers for removing switch plate covers, a hammer for removing nails, Sandpaper, Caulking, Putty, Spackling Compound, masking tape and plastic or canvas drop cloths for protecting non painted areas.