What Are/ why do you need a similar slot ? Sorry Dont understand 
Anyone got a nice free or cheap laptop going 
then i can buy some a/v

Don't worry, pscocoa doesn't understand mobile web either.

A tablet is, essentially, a mobile phone with a bigger screen. Apples software between a tablet and a mobile phone is almost identical.
So, with a tablet, you need to decide where your going to use it. If just for home use, then then your home wifi internet access will give better performance than the the 3G mobile network you use on your mobile phone. So you need a wifi only model, and it will be cheaper.
If using a tablet out and about, away from home, then you need a tablet with access to the mobile phone network. Hence it will need a SIM card just like a mobile phone. So you need a wifi AND 3G enabled tablet.
UNLESS... Ypu have a mobile phone capable of tethering. In which case you can have the best of both worlds, as you can connect the tablet to the mobile phone and use the data on your mobile to download from the internet, through the mobile, to the tablet.
BUT all Tablets are touch screen. So the accuracy of touch is still going to be a slight issue, although improved, as the virtual key board is proportionately bigger according to the size of the device.
Seems you need to decide if you want a touch screen device at all. If you do, what mobile phone do you have? You need to know if it is capable of tethering.
