Hi, I'm in the same position (also Xbox)! There's so much more for the PC but I do love the challenges and karma powers (I've only used the good ones so far...), and a good enough laptop costs a whole heap. If only I could pay in simoleons as my couple have built up a nice little savings pot. I'm sticking to Sims 3 for the moment, one of my Sims in Sims 3 Pets after several sim weeks of hard work lost her voice, it was really weird and quite frustrating.
What do you think of Moonlight Bay? I liked at first, but the bit I like best is where you start opposite the Pity Committee Community Park, but it has the smallest bungalows. It's great to be able to nip across the road and socialise and fish, play chess, and then nip home when the poor sim starts thinking of sleep. Jacob's lifetime wish is to be surrounded by family. But the first place you get is too small. It gives me a headache to keep track of sims over two floors so a bungalow is perfect. The only other one I like is where I think Herger Monroe or Vicky Pollard lives near the community garden. But I don't think the garden is as nice as the other community park. Jacob's an angler so it wouldn't suit him. I'll probably have to change his lifetime wish.
I've picked up quite a few tips from this site and forum (thanks!) but I've still got so many questions! Especially about building.