I have a similar setup but a grizzly 20" straight knife planer and the same shop fox 26" double drum sander.
Get the double drum sander! Set it up right and you get two passes for the effort of one.
I'll agree, size matters. But it does lead down a slippery slope. I finally broke down and bought a bigger jointer, a 24" for wide boards, and guess what, that 20" planer is looking like it wants to be swapped out for a 24".
Seriously though the 20" has considerably more power, and 5hp will do a better job in the long run than 3 hp. But whatever rotating chisel gizmo you use, you will generally need to sand. Machine jointed edges look machine jointed. Put a nice finish without sanding or at least scraping and it looks mire machine cut.
What does it mean when you've accumulated enough tools that human life expectancy precludes you from ever getting truly good with all of them?