- 4.2" (800x480) < screen < 5" (1024x600) - jack 3.5mm - full USB with host capabilities - d-pad (can be some kind of trackpoint instead of stylus) - camera isn't necessary but if there is 2-3Mpx of good quality - extendable memory (SD better but not necessary) - hot-swappable battery - BT - Wi-Fi - better processor (possibility to watch movies without rescaling for tablet) - more RAM for more multitasking - full access to *unix layer, preferably with normal tools, not BusyBox subset - starting price $300, which means relatively quick fall to $200 which I am ready to pay