ive used MELODY and SONY...both are for 150 rs. from defence karachi , but i am sure if u buy them from saddar they will be cheaper...these both work just fine for me , mashallah ive never got a dirty disc error.
yes , laptop burners work , i burn my games from my laptop and they work likea charm , it might be the disc that you are using or may be a problem with your burner , it may not be compatible with a DVD+R DL discs.
Also use the correct software to burn your discs XBC 2.6 works perfect, i found it for download through one of shayan bhai's own posts with a tutorial and i never needed any other guidence or software, maybe he can provide u a link to his post. or just straight up search for it in the XBOX360 section.
If its the disc thats causing te problem , use MELODY and SONY...ive found these both to work besides the verbatim discs...hope this helps and rest shayan bhai can clearify.