I've heard the Rokit 6s. They are pretty good. Good bass but don't go very loud.
Even the Rokit 5s would definitely be a step up from the M-Audio AV40s. M-Audio BX5A would be comparable to the Rokit 6s.
I've owned a pair of M-Audio BX5A with the M-Audio SBX10 subwoofer and it was a killer computer speaker setup.
LG OLED65E6 | Marantz AV8802A | Marantz MM8077 | Panasonic DMP-UB900 | PS Audio PerfectWave P3 | B&W CM9 | B&W CM5 | Dual JL Audio Fathom f112
Maingear Drift Z170 GTX 1080 HTPC | BDI Mirage 8227 | Logitech Harmony Elite | Synology DS916+ | TEAC UD-503 | Focal Solo6 Be | Vizio P50-C1