Why go Seagate not Maxtor then?
From what I observed on newegg's customer reviews, I thought Maxtors are the best, coz these were bestsellers, IBM's were giving problems, also I thought ATA133 would give it a big performance edge but when I read a couple of reviews of the Maxtor's ATA133 HDD's the reviews suggested that there wasn't much performance difference, also at ATA133 the CPU usage was around 50%, very very high compared to the CPU usage at ATA100. Perhaps that was because there was only one board available for ATA133 at that time (didn't find any reviews with ATA133 cards) So as far as speed was concerned, Maxtor didn't seem to get any huge performance difference.
When I found about Seagate's Barracuda IV (40GB per platter), I read from reviews that it is quieter than the Maxtors, even quieter than the Maxtor's "L" series, the one with Liquid dynamic bearings. Also, I didn't read about any failures on this drive.
I think there isn't much speed difference between Maxtor D740X's and Seagate Barracuda IV's, but to me Seagate is the winner for quietness