EyeB you can increase the size of your data.img using the instructions/tools here:
xda-developers - View Single Post - [APP] Windows: Create Your Own Data.img Maker Application, +/- From Existing data.img
I made mine 512mb and its working well. I wouldn't go too crazy though, anything over 1gb is total overkill.
Don't forget to thank the dev on the original post if this is helpfull!