If you are planning to come to Doha soon then, I suggest you to bring one with you Dell XPS, HP or Toshiba are good brands; cost of a good laptop in Qatar is 10% to 20% higher than in India or Dubai. Internet 512k and land line together with standard TV connection is at QR250/month and installation is QR300 I guess.
Second part of your question; you will know when you are here.