I’m looking at Android devices, as there seems to be too much “lock in” on apple and amazon devices.
Talking to Harvey Norman today Monday 5th of December I’ve came across the following:
€449
Toshiba at100 (sold as the Toshiba Thrive in the US)
http://www.techradar.com/reviews/pc-mac/tablets/toshiba-at100-1003950/review
The Toshiba, Has got a SDXC card, memory card and has mini USB and replaceable battery, Its also got proper USB ports and a proper HDMI port.
€399
Acer icona
http://www.engadget.com/2011/04/26/acer-iconia-tab-a500-review/
3.5mm headphone jack, a mini-HDMI port.dedicated power jack (Means having to have another charger!) and a pair of USB slots: one micro-USB to transfer data to the tablet, and one full-size USB port which connects with both your storage drives and keyboards, just connect this to a usb hub and you be grand.
More reviews are here:
http://www.pcmag.com/slideshow/story/266915/the-best-android-tablets/
http://www.techradar.com/news/mobile-computing/tablets/13-best-android-tablets-in-the-world-905504