being able to sit things down in it, rather than bending down and messing with stuffing things in the side cases.
I thought I saw side cases also on your bike in another pic, which continues the black/silver balanced look.
Agreed the top case adds easier use. Always load heaver items in the side bags regarding CG.
Honda would not sell the ST1300 accessory top case in the US because of liability issues; but were available through a European retailer.
At high speeds the ST was unstable w/a top case. There were few serious accidents involving motor cops if memory is correct.
My 2010 F800ST had accessory expandable hard bags and installed the smaller silver accessory soft top bag.
My 2004 ST13A had a soft RKA top bag mounted on an expanded tail rack/backrest.
Remember, a hard top case WILL change the ride character.