Dear Arman,
I don't want to write alot here, as I have written about this before. But I strongly recommend you to buy a Mac, may be an iMac or a MacBook Pro if you want it to be portable.
It is nice that you have learned and mastered VB and complete Java at this very low age. You are talented and I am sure you will be a good programmer in the near future.
I just want you to know that If you find yourself mastered in something, you will never get progressed in it anymore. If you are aware that there are always something you don't know and you are interested to learn it, you are always progressing and that is the golden key of success.
It is an honor that your dad knows me, but I am sorry to say that I am not the owner of HashtBehesht...! It is a name similarity.
I am an author and publisher in Iran, experienced in software development. I am also a teacher and have taught many courses around Microsoft software development technologies.
Say hi to your dad and bye.