patio umbrellas

Judging by the recent weather locally, it's going to be a few weeks before I am ready to take advantage of free shipping on patio umbrellas. I seem to be buying new patio umbrellas at fairly regular intervals, so I really want to look for a quality umbrella that will last for more than one Summer this year if possible.
Once, we even bought one of those hanging shades, but it was useless and kept falling over in the slightest breeze. This year, we are thinking about a fixed 'sail shade' as an alternative, but I prefer the flexibility of an umbrella that I can move around the patio and even the rest of the garden.