I have no problem at all with how fast the 5400 rpm drive responds, infact I'm really pleased with the response time. I doubt you will tell much difference between the two. A 7200 rpm drive may resond a bit faster but it will also run a little hotter too. IMHO I don't think you will see a benefit, if I thought there would be one I would have bought one that speed myself. By the way I have recorded many shows now on the 1TB drive and there are no issues at all to mention.