I have a 5110 and 586 and both seem to cast my sharkskin 5f, airflo ridge 5f, DT5, clear camo 5I, type III and type IV sinking lines well. The shorter 586 is faster but needs a few more feet of line out to feel loaded. The 5110 roll casts and single handed spey casts the DT very well. If you want me to try out your 590 I'd be more than happy to take one for the team!