the speed you burn the downloaded movies at wont do anything for the picture qualety...

its just that the qualety of the movies on the network suck...people dont rip/convert them properley from the dvds, using verry low resoulution ,over compressing etc.

to avoid bad picture qualety dont download anything less than 700MB (for a full lenth eg 1hr40min movie anyway).

if your DLing smaller videos the general rule is it should be 100MB for every 10 minuts of decent video. so a 20 minut video should be no less than 200 MB for good qualety.

the larger the file size , the better the picture .