Hi,im looking at buying one of these,there seems to be an older shape that looks like ebuyer are selling and the more rounded shape argos are currently selling for £84.99

im reading alsorts on the net and im confused

im reading T810-T825,Software versions,some are better than others

So which one do i buy?,and is the one in argos at the min (more rounded shape) just the same as the older squarer shape

Thanks for any help
craig