Commute is actually 30Km each way but with the option of a partial ride or only going one way a day (good bike facilities at work). I want to regularly ride at least one way rather than do the partial ride.

Roads are mostly OK, can do it on the roadie. Although there's something that doesn't quite feel right when riding over small seeds as they go pop pop pop-pop out from under the tyres.
Gradient - Well I take the longer way to avoid hills

Everyday load for work - bike stuff (spare tube, tools etc.) change of clothes, lunch, wallet, keys. Have Topeak Pannier bag and will fill the top bit and most of one side.
Max shopping load - Don't plan to use for shopping. Have supermarket down the road so I walk.