45 liters is not a large amount of capacity. You might want to forgo the front rack at least to save some weight and go with some bike packing type bags like this,

Revelate Designs LLC

You can also check these out,

Anything Cage HD | Parts & Accessories | Salsa Cycles

Alternatively, with 45 liters and careful packing, you could easily get away with a rear rack and 2 panniers and a smallish front bag.