Why not buy the basic h2s without any addons and follow the instructions in this thread to install a backup image which comes with the sky Q , original sky and a VM skin.
http://www.digital-kaos.co.uk/forums...3-Backup-Image
Any size USB drive or micro SD card will do, all depends on whether your a watch and delete type of user or one that tends to keep there recordings for a while.
Again yes, all recordings, timeshift and EPG will be stored on the USB or micro SD drive.
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