As I built heavy-weight desktop computer few days ago,I can't really afford a laptop with higher specs. For the study,I really need a lap-top ASAP. ASUS or Lenovo? Remind the budget You can recommend or check these websites-
Oh yes, you can always get the external optical drive anytime. Laptop int opt drives fail when left unused for months, the ext opt drive doesn't. Also, the laptop's weight is reduced this way as you don't need to carry the drive everywhere. Get a USB 3.0 ext optical drive for good installation speeds.