I bought one of each of these recently and just wanted to pop these up in case they help anyone trying to decide on one or the other.
Personally I prefer the Miraclebox looks, size and remote as Sicilian said I would (I have an XP1000 and LX3 with the same remote as the MB) although I bought the Technomate for someone who wanted everything inbox (i.e. no external HDD) so figured I'd do a quick side by side before I go and setup the TM elsewhere.
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Spec wise the boxes are pretty much identical internally - if you want optical audio out you have to go with the Miraclebox out of these two and if you want an internal HDD you go with the Nano.