I feel like anything with rack mounts will be good. Maybe check out a cross bike? or one of the "entry" level road frames that come with better components. (entry is being used lightly, just because most entry level bikes come with rack mounts, or so I have seen).
If you are not using a rack I would look into one of the endurance-race geo bikes. I use to have a synapse and could ride it all day.
What brands do you have around you?