I run with the same combo as "Slaninar". I use the Givi 340F top rack too, but my box of choice is their biggest...the E55 Maxima which holds 55ltrs...or the kitchen sink!!
This combo is more than enough for your Sunday day trips. The box and bike is stable up to 120mph which is as far as I managed so far. To save space, just buy a good wire lock to tie your helmets onto the bike and put your coats and stuff into the box.
You can buy a set of soft panniers, but using these or hard luggage is a bit annoying for day spins especially for the passenger getting on and off the bike. I only use my full luggage on my Bandit for full touring on holidays. If i'm stuck for a little extra space, I'd rather use my tank bag.
This combo is more than enough for your Sunday day trips. The box and bike is stable up to 120mph which is as far as I managed so far. To save space, just buy a good wire lock to tie your helmets onto the bike and put your coats and stuff into the box.
You can buy a set of soft panniers, but using these or hard luggage is a bit annoying for day spins especially for the passenger getting on and off the bike. I only use my full luggage on my Bandit for full touring on holidays. If i'm stuck for a little extra space, I'd rather use my tank bag.