Both does drives will love DVD+R's. Your problem is not your drive but the media you have. GQ is trash media. Trust me on this burning does effect QUALITY of the burn. Like I said before it all depends on your drive and media used. Going slower is not allays good with this newer drive. By a small pack and try them out:
http://www.newegg.com/Product/Produc...82E16817130961
this is for cd-r:
http://www.rima.com/Merchant2/mercha...ode=TAIYOYUDEN