Roma will be too crowded this time of the year. Nevertheless, it´s a truly wonderful place that you must visit at least once in your lifetime. But perhaps summer is not the best time.

You will love Portugal. I do. And it´s also very cheap and so charming.

Be careful with Spain in summer though. Also too crowded and the south can get very very hot. Also Madrid is hot and life short of stops a little during August. As Orix says, Catalunya and Galicia are the best places to go this time of the year. I´m in Galicia right now and the weather is very mild...around 20C every day, and Santiago is one of those places that you will never forget. And trust me, as sick as you may feel of being in sand, the beaches around here are a feast for the senses, so clean, beautiful, wild and if you know where to look, so quiet.