intelligent advice YOU need to tell exactly how you will be using the computer and the applications you will be using it for.
You also need to tell us whether you can perform repairs yourself or if you will be needing customer service for every little issue. We need that info because some manufacturer's have excellent support while others may as well not even offer support because their support is so bad.
As an example, a base line Acer netbook offers portability and works fine for accessing the Internet and sending/receiving emails and for simple word processing and a few simple spreadsheets. That same netbook would be essentially worthless for trying to play most games and for trying to work with data bases or CAD/CAM applications. It also wouldn't keep a user happy if they were doing a lot of graphics work using applications such as PhotoShop.
Here are the specs for the HP you asked about:
I am thinking to buy HP Pavilion Ultrabook™ 14-b006sa, but I don't have much idea about the specs and other stuffs. Also, I did not find any review on this laptop so far, so could you plz help me out. Is this laptop worth paying?. Also, could you suggest me any alternatives if available under £400 budget laptop.