FakeBlood, I can highly recommend the Toshiba Thrive 7". It has a separate dock/charging port from the mini-usb, which is nice. It does have a micro-sd card slot and the mini-usb. And it comes with a file manager!
When you connect the Thrive to your PC it comes up as an external drive. You navigate to the Downloads folder and copy your apks there.
Then on the Thrive open the File manager and navigate to Downloads and click on the apk to install.
You don't have to disconnect anything.
If you update the apk, or add another, and the Thrive File Manager is open, use the 'Go Up' button on the bottom right to navigate up and then go back down to refresh the contents.
It makes for easy testing.
It is an Android 3.2.1 device with 32GB. It is not cheap, $350 US. But it is a very good tablet.
The Nexus 7 doesn't have an sd card of any sort or come with a file manager. But you can download a free one and it works just as well (I just installed the Rhythm Software File Manager).
It is hard to get the 16GB version, but the 8GB one is fine for basic testing and only runs $200 US.
Cheers,
Ancient Lady
AGK Community Tester