Where did you here mobile penryn will be out in january? I know consumer level desktop chips are due then but I haven't seen anything specific on when mobile will be released (save for some talk of a ultra high end mobile quad core that might be the first mobile penryn will dual cores coming later). If the laptop is a secondary machine then most of penryn's features won't matter too much (at least in the short term), if it is your only or your primary machine then the new sse instructions and extra cache might be worth waiting for.