What is with all the mountain bike suggestions? He said primarily streets, with the option of trails. That screams "Cyclocross!" to me. The Blacksheep Pineridge comes in custom steel for $1400, and could easily be built up nicely for around $1000 more, and moderately for $500 more.

Other good CX options for cheaper are the Bianchi San Jose, IRO Rob Roy, On-One Il Pompino.

You can go Ti from De Salvo for $1875.