 <p>I would also recommend sugarCRM because of the larger community and availability of third party plug ins, having worked with both i can say that sugarCRM's studio gives you a bit more flexibility. There are also many plug ins; I would recomend the ModernAqua theme to improve look and feel.</p> <p>I'll give you a warning however, sugarCRM is not always nice to work with. Its code is poorly documented and maintainance is a big hastle. upgrading with custom code is still error prone through version 6.x despite what they say and changes will be overwritten by the module builder.</p> <p>So in short, go with Sugar but think carefully before customizing it too much because it can be a pain to maintain.</p>