Hi ypkdani,
Whilst I cannot give you a specific answer, I can give you a general open ended response.
I'm also embarking on my first design with touch. The one think you MUST DO is read, read and read some more the datasheets and the applications notes pertaining to the manufacturer. All the info is there.
My latest favourite is Cypress and their CY8CMBR3116 (CY8CMBR3xxx) range of CapSense. They also supply free software that you can configure 'things' if you have slightly messed up your design via the I2C bus. I have an ongoing forum question concerning if any 'USB TO I2C' boards will work with their software (EZ-Click 2.0) or you have to buy there own one --- mmm let me think what they'll say!!!!!!
Lastly, I am struggling to find an EDA (free) program that will do a hatched ground plane around the pads using the copper fill/pour tools. You will probably have to do it in Inkscape and import, KiCad also doesn't import graphics onto a copper layer you have to use its "Bitmap2Componen" utility (somehow)