either model will suit your needs. I enjoy the feel of a steel fork, but many people like carbon forks for the feel. the primary advantage of the carbon over steel is weight-savings. The carbon will be less jarring than an aluminum fork, with similar weight. The steel fork has the benefit of being the sturdiest by quite a bit. I weigh 250lbs, and i like to use my bike to move objects, so sturdy is important to me. it may be less important to you.
As far as the geometry goes, the cross geometry will have a lot of stuff going for it that may not mean much to you yet, but it'll have a higher bottom bracket shell for clearing stuff offroad, and it'll have shorter chainstays. The cross geometry will feel more nimble and zippy than traditional touring geometry. The touring geometry will have a lower BB for increased stability, and long chainstays to increase wheelbase for a more stable feel and, more importantly, increased room for luggage. There are other differences, but overall, the 'cross geo will feel responsive and nimble as compared to the staid demeanor of the tour geo.
In all honesty, even though I think the 09 looks way hotter for my needs, i think you'll prefer the 08 for commuting, having fun with the kids, and messing around in general. If the fit and feel was super-good for you, I wouldn't sweat the fork. There are plenty of steel forks that you can fit to the 08 aurora elite if you want to change down the line.
My advice? Get the 08, but try to get a deal, since if they ain't sold it yet, they will have more trouble when the 09's show up. Put the savings into wierd, demented experiments with different tires, your preferred pedals, and a steel fork if any interweb horror stories about snapped CF forks end up spooking you. (FWIW, I've yet to see a CF fork snap that hadn't been abused. And, I have seen steel forks fail. But, I've seen lots of steel forks suffer abuse without any ill effects. I simply trust the stuff. But i'd never let the CF vs steel fork issue be a deal-breaker, unless I was touring loaded.)