David,
The Tamiya Extra Thin Cement is an excellent choice for plastic modelling, with which I have excellent experience, but please note that it is primarily intended for capillary application, i.e. you first put the two pieces together without glue, and then carefully add a small amount of cement to the joint, either with the brush attached to the underside of the bottle cap or with a separate brush. Capillary power will then pull the cement into the joint were it will join the parts by melting them together.
If you need to apply the glue to the joint surface before putting the parts together, you will need a less liquid cement. I have not (yet) tried it, but have heard others say good things about the Revell Contacta cement … although I'm sure there are also other brands that work well.
Also, it is important to remember that the above cements will only succesfully glue opaque (styrene) plastic to the same kind of plastic. As Colin already said, using them on clear plastic is likely to create fogging, and should your model also have for example photo etch parts, these will need to be attached using CA glue.
/Mattias