Bubb and Faster,
Have you tried one of those little impeller pumps that you chuck into a drill. I started with a small hand pump and switched to one of those recently and it's great, but I've not used the big vacuum pump for a direct comparison.
I got one of those some place. What i don't like about is you have to bring your own containers for the old oil. I had the hose jump out of the milk jug once when I had my back turned and pumped about a 1/2 quart on my cockpit sole. The 15 mins. was oil and filter change, all done and engine ruining.