I agree; with quality HDDs so cheap now, 500GB or above will hold more than you'll ever get around to watching and won't upset the bank manager either.
That should be plenty. Miles better than the measly 160GB I get on my Virgin V+ box - HD recordings gobble up the space and I'm constantly having to delete stuff.
... now trying to figure out which ones are (near) silent, will power from Humax's USB (without an AC adapter) and will stop spinning when not in use...
Any advice on the above? And would portable drives generally be quiter and more likely to power just from the usb port?