Looks like the Mavic A319 is a good sturdy rim for commuting. Mavic makes very nice rims. A quick search about Deore hubs indicates that the Deore is as strong as the Deore LX or XT, just not as light. So sounds like you got an excellent recommendation for your needs. Have the hub overhauled once a year and it should last you a long time. Rim longevity depends more on how and where you ride it, and the tires and tire pressure you run.
Oil is good, grease is better.
2007 Peter Mooney w/S&S couplers/Terry Butterfly
1993 Bridgestone MB-3/Avocet O2 Air 40W
1980 Columbus Frame with 1970 Campy parts
1954 Raleigh 3-speed/Brooks B72