is this tablet good for ppsspp?

[Made in China]

Not wanting to plug anything, but I can recommend the tablet I'm using right now - the JXD S7800b, as being very suitable for PPSSPP. It's a 7'' tablet with a RK3188 (quad core 1.8 GHz, Mali-400 mp4) and 2GB of RAM, plus it has PHYSICAL CONTROLS. Awesomeness ensues.
You can get one at dinodirect for $140, about the same as the tablets you've considered. I think it can give you more bang for you buck.

Also, take note that due to its physical controls it's more the size of 9'' tablet. Take it into account as it may affect portability.