The Sony PRS-T2 is a great successor to the PRS-T1. The differences are perhaps minor, but the new model adds Evernote and Facebook, and improves loading times. The one area where it falls short compared to last year's model is the audio support, that has been left out completely. Even without the audio feature, the PRS-T2 is one of the fastest and complete e-readers that is currently available.
Slow computer got you down? Maybe a hardware upgrade should be in your cards, if so this guide to the Fundamentals of Upgrading a PC is an invaluable read. PCSTATS Tips