I was wondering if anyone here is an expert on GPS systems. I am thinking of buying one as a gift, and am trying to decide on a model. I've used the TomTom One before, and really liked it. It was really easy to use and got me where I was going fine. But, I'm also considering the TomTom XL-S, which just came out. It's a little pricier but has more features, like Text-to-speech. Any ideas?