SVT I'm also using Sporttracks and FE - as well as my trusted old Excel workbook, and of course Traning Centre.
I was also trying MotionBased, but it's crap, even when the service is working, it's crap! It makes me wonder why Garmin ever purchased MotionBased - why didn't they go straight for Sporttracks?? Even with Garmins money, it'll take at least 2 years for motion based to catch up.
The only one I haven't tried is Memory Map - I saw it demo'd at the FLM expo and the mapping (it's OS maps) is reeeeeeeealy sexy, but it's 50 quid for one UK region, and the Sport tracks map is sufficient for road running.
I still use Excel for the graphs. Someone on this thread said that soon FE will do an XML or CSV download feature so that you'll only have to enter stuff once...
Until then I'm going to use the 4 products until they, one by one, prove themselves no longer useful.