I haven't owned a bike since I was a kid, but I have ordered a dahon curve d3 and I need advice on a good lock. I imagine myself riding to the beach or to a cafe and having to lock my bike for maybe 1-2 hours...as of now, I don't intend on locking it for anymore time than that. What are some good options for me and how much can I expect to pay? Now that I think about it, size is an issue also...I mean I don't want to be riding around and having to carry some HUGE lock with me....I'd like something simple but reliable, especially considering the short time span I think I'll be locking my bike. Thanks.