Soule is nothing special. Iling may or may not become something special - as things stand, he's a speed merchant, but we don't really know how much further he can develop.
Retardi is yesterday's news - we know exactly what we get with him, and he's a solid player for Sass, but unless the price is under 25 million on a 2 year contract (with an option for a 3rd) and a reasonable salary, he's a hard pass.