Yeah, I use the Rosewills. Like the way they turn on at the front instead of at the back.
About the sector sizes... Are you talking about data chunk sizes? When dealing with something like video footage, wouldn't you want the larger kb sizes? I understand where you would want 8kb or even 64 kb sized chunks for data so as to not have a lot of lost space when writing text data, etc. But (I think I read where the Seagate 1.5 writes 512 kb chunks although I may be confusing chunks of data with something else.
afterthought: Just remembered reading that the 1.5 TB drives are essentially the same as the 1 TB Seagates... only difference being is they added another platter so they are using 4 platters instead of the previous three with the 1 TB drives. I've used the first generation perpendicular drives (500 GBs) and they've worked great so far. I see no reason to shy away from the 1.5 TB models.