I'm not sure where you got the information that the HP has a better display or "better build quality". One thing to look at is relability reviews by sources such as Consumer Reports, PC World, PC Mag, etc. You'll find that Apple is almost always at the top of the list, whereas HP doesn't fair so well.
Consumer report stuff is flawed cause it looks at HP as a whole company, whereas the business products are on a completely different level compared to consumer level product. I can say for sure that the HP Elitebook s are the best build notebooks you can buy. Yes they are better than Apple. And well screen is undoubtedly the best you can find there is no competition. Screen is another reason i dont want a MBP, while MBP screens are somewhat average at best in terms of color reproduction and contrast when compared to the HP screen.
Honestly right now i am gonna try and get my hands on a MBP and use it to get an idea of how Mac OS feels. If i like it then i will get the MBP otherwise HP.