Originally Posted by exile

Jamis tends to give you a lot of bike for not a lot of money .

To get back on topic however, get whatever lock you will use. Mini's usually provide adequate protection (5 minutes to cut rather than 8), are not a lot of money ($25-$45), and don't weigh as much as the beefy ones (2 pounds vs. 5+ pounds).

Add to that a cable or chain (if you want) and you should have adequate protection, although there are no guarantees.