Should I reorder RADB,ARIN to be ARIN,RADB?Definitely. We have objects registered in all databases feasible to prevent AS-SET squatting, which has occurred in the past, while only RADB has the actual members listed. Turns out correct prefix list can be generated using bgpq4 regardless of the order, so it's better to prioritize authenticated sources.
In thinking about this some more... Is IXP Manager's behavior of per-participant IRR sources actually useful? In other words, what's wrong with just setting everyone to: ARIN,RIPE,LACNIC,APNIC,AFRINIC,RADB,LEVEL3?
-- Richard