Hi My laptop is now overheating constantly 5 years old. Its time to invest in a replacement. I am self employed and need to do the following

Update simple Excel spreadsheets that are sent to me on a weekly basis and return the updated info. Use in the field and in my car Email although I can use my Iphone for this when out and about Some Word letters, which need printing.

Ideally I would like a Tablet that uses Microsoft Office. However I am now finding out that it is not quite that simple! I have looked at Microsoft Surface but when testing it in John Lewis it did not seem that responsive and dont get me wrong I am not the fastest cookie. I liked the touch screen idea of Windows 8 Is there an obvious option I am missing here? Maybe a lightweight Ultra book or another laptop with touch screen? Or are we waiting for this ideal to be released onto the market or perhaps I am asking too much. I have not mentioned price as wish to look at all options really! As always would appreciate any assistance on this you can offer

Thank you