Defo second that about the Xsjado's, I just copped some new Xsjado's purposefully for powerblading in, as now I can cruise around the city, hopping into a cafe or on the tube without having to carry a bag around to put my shoes in.
Plus and equally as important, Xsjado's naturally have great heel-hold from having the ankle ratchet strap which you may have noticed is the main feature on the newly released USD Carbon Powerblade skate. For me Xsjado's are perfect for the job.
Oli is right, all of these Skates are fantastic PB skates and what Tom said about the ankle ratchet is even true but u both forgott a great PB boot. Rollerblade solo´s seem to be made for these. I actually use them with the Original switchframe in a flat setup. Not as fast as advanced or arrow setups but the have a groove^^. These Skates are the best PB Boots for me cause they are light enough, stable enough and they have the fastest Souls on planet.