Have a look at the power monkey range. we have several of their bits and pieces and they are solid, weather proof and seem to offer the best power compared with many of the competitors.
For charging phones, tablets and pcs, we tend to use power blocks and then use the solar to charge the blocks . Also, don't expect too much from solar. Unless you have constant, strong sunshine, you'll probably get enough charge for a phone per day.
Also, have a look on ebay, as power traveller have changed their range and there is a lot of their older stuff going cheap.