My current desktop is a Dell E310 (Pentium 4 3.0Ghz w/ HT, 1GB ram, 160GB Hard drive). How will it compare to the baseline MacBook (upgrading to 2GB of ram)? I plan on running Windows on it. Should I expect a noticeable improvement/decrement, or something very minor? How will it compare in terms of games? I play The Sims 2 on the Dell on low settings and it is pretty smooth, so can I expect similar or better with the MacBook?