A wine can also be called chianti if a blend with 75-100% Sangiovese, up to 10% canaiolo and up to 20% of any other approved red grape...grown in the Chianti region. I am beginning to see wines labeled "Sangiovese" and haven't studied their origin but suspect they come from somehwere other than Chianti. A true Chianti Classico will have a rooster on the label, although the quality of Classicos can be wildly different. In my opinion a Davinci Chianti is as good or better than a Gabbiano Chianti Classico, although I try to find something better thsn either of those two.
If looking for a "big" wine that isn't terribly delicate, try a Primitivo from Puglia. They are especially good with hearty red meat meals. The Zinfandels from California are Primitivo's first cousin and provide a similar experience.