I'm looking to do this to my owned HR20-700 and have a few questions... 1) Any general recommendations on HDD brands? The consensus seems to be to avoid Seagate and that WD is the way to go. Does that seem right to folks who have upgraded their drives and have a few years of service under their belts? 2) What's the stock speed on the disk shipped in these boxes? 5400RPM or 7200RPM? My HR20 is a tad slow since the UI got updated (though nowhere near as bad as some of the 21/22/23 boxes I've seen)... so I am curious if upgrading the hard drive would help with this (i.e. from 5400 to 7200 or perhaps a velociraptor), or if the bottleneck is elsewhere. The flip side here is that I don't want to increase heat if I don't have to, so I'm just curious what people's experience is. Thanks!