Hi everyone. This is my first ever post. I'll get right to it. I'm thinking of getting a bike for commuting to and from work. My trip would be about six miles one way. Most of it would be on a sidewalk or bike lane. Only a few hills, none steep. The guy at Dick's Sporting Goods told me I should get a hybrid. The options there are the Diamondback Kalamar, and the Diamondback Menona. The Menona has some upgrades over the Kalamar, but since I'm not very familiar with bikes, I don't know if they are significant.
The Kalamar has a cartridge type bottom bracket. THe Menona has a sealed cartridge. Is that a big deal?
The Kalamar is a seven speed, the Menona is an eight speed.
The Kalamar has regular bike brakes where the Menona has disc brakes. (who knew bikes had disc brakes?)
The Kalamar has double tunnel alloy rims, the Menona has doublewalls.
The Menona has puncture resistant tires.
Due to my awesome negotiation skills, I can get either of these bikes for roughly the same price. Can you guys help me decide which is a better bike for me? Just how much better is the Menona than the Kalamar?