I realize my info is a bit late in coming. I have the Speedmachine 10.0 skates, and have skated part-time on them for the last year. As I see it, except for the frame and brake, they are mechanically exactly the same as the Marathon Carbon TF from 2007. I consistently buy Rollerblade because their boots fit me well. Basically, they are good fitness/casual race skates if they fit your foot well. I see two problems with the Speedmachines 10.0:
1. The 104mm frame - I have not been able to find replacement 104mm wheels. I think RB really screwed the pooch here by offering a relatively high priced set of skates, and didn't make sure there were replacement wheels out there. No one in the US carried 104mm outdoor wheels for all of 2008. It is my understanding that Hyper is offering 104mm wheels this year (see http://www.hyper-race.com/Product_Detail.aspx?Id=1029
), but at 13.25 a wheel, not a good deal for training. Yes, I'll probably get a set for events, but it just burns me that I can't get a decent 104mm training wheel for <$10. RB got smart this year, and are offering models with 100mm and 110mm, but no 104mm.
2. My big beef with RB in general - they don't sell replacement boot liners. I rarely get more than one year's wear out of a set of RB liners. The boot shells and frames stand up well and can last for at least 2-3 years, but the liners pack out and start to fall apart after about 2/3 of a season (I skate 1200-1500 miles a year). i really wish I could find replacement liners.