Cool, thanks. I'm really looking forward to some Pokemon ROMS since my DS is out of service. Are there any things for sure that I should install for overall performance/appearance boost?
If you want an appearance boost, you should install ADW launcher. You can have tweaks and themes that are nice for the look and navigation of the tablet, it is very customizable. I haven't heard of any apps that could boost the performance of the tablet, but you should install the latest firmware in Skelton's thread, and you could also try Skelton's script, which gives you a clean and cool state for the device.
I noticed that viruses are present in some apps, and they do slow down the performance of the tablet, but there's AVG for free, however remember you have 512mb of RAM + 256mb of Virtual Memory to install apps, as many of the apps run in the background. ADW Launcher takes quite a bit of RAM, so if you want an appearance boost you have to take into account how much RAM you will have for the rest of the apps you might want to install. In my experience there weren't any issues with the performance of the emulation even when I had quite a bit of apps running in the background. The only issues I have are with the PSX and a bit with 64, but again, it seems it's a problem with the device or the firmware, I don't know.
Widgets are also a good choice to give a boost to the look of your tablet. And if you want to buy an app you can buy a Google Play Gift Card if you don't want to use your Credit Card to have balance.