Hmm...Might I suggest Awakening then? Aside from it being the newest release in the series, with the new casual mode, it's a lot more...forgiving, especially to newcomers. If not, you can't really go wrong with any title in the series. In my personal opinion, every game that made it stateside (along with Holy War) is a solid title.
Also, Awakening has copious amounts of Vaike Time, so it wins bonus points in my book.