Quick thought about pads. I managed to mod my Q701 pads to fit the HE-560s. Basically, I tore them up, salvaged the foam, trimmed the old HFM mounting rings (they're bigger than the new ones, and couldn't get past the yokes, which meant no real fit and seal), and then trimmed the outside edge of the foam to make it roughly the diameter of the mounting rings. Stitched some very soft microsuede on for comfort, et voila! totally different pads from the FocusPads (don't have the FocusPad-As yet; HFM shipping this week). They're not much to look at, but fortunately I don't have to when they're on my head.
Soundwise, the Q701 pads produce more bass, but the sound is slightly more diffuse, compared to the FocusPads. It would seem the denser AKG foam is the key contributing factor. The soundstage is definitely bigger, but imaging may suffer. As has been noted, the FocusPads live up to their name. I'm really impressed with them; very balanced with the HE-560s. That said, the modded Q pads work very nicely with some stuff where strutting around a big stage plays well. I'd still say the FocusPads produce more accurate bass. The Q pads have no dust screen mesh, so it's just the ones over the drivers. Upper mids and highs really shine. I'm thinking a somewhat V-shaped signature is produced, but I've no way to measure it. Would be fun to compare to the HE-400s, which I've only read about.
It is nice to have options.