The Silhouette Cameo would be my recommendation for the computer-savvy, because it will cut any font you have installed on your computer, and any shape. The initial outlay is more, but no cartridges are required so the only continuing cost is consumables such as blades and cutting mats.
The Cricut range of cutters cost less, but all need cartridges in addition to the blades and cutting mats, so you have to buy separate font and shape cartridges. That can bump up the cost.
Actually I just checked the Superstore here and the Silhouette is on offer for the same price as the Cricut Expression 2 - very cool!