Best stuff first and always.
I only have good / best tools at work. I had cheap junk when I started, but they all got replaced over time with good stuff. Very little mid-level stuff at home - I take most work beyond light stuff to the shop anyway.
Grease, **** (literally), diesel, hydraulic oil - whatever - it just wipes off when I get done.
I sometimes do cringe a bit when my tools get soaked in water - dropped inside a water tank, or working out in the rain or a pump leaks all over me / them. The rust possibility or shorting out electric tools is a consideration. I also notice it a bit when fire / sparks / weld spatter starts flying around, but they don't stay wet long enough to matter and the other fire / sparky stuff may leave some battle scars, but money and time is more important. As much as I do like my tools, I don't get paid for the shine / pristine cleanliness....but using good stuff does make the work go better, IMO.
When I have to pack up for road service, I take all my regular shop tools I think I will possibly need. No second set of road tools for me so far, though I'd kinda like to setup a box for it, but not 'till I have dedicated service truck of my own.
I guess it is a consideration of what what is "best" - to me it's best quality. My 20 YO SO wrenches with the chrome wearing off getting used everyday at work are still "best" over the shiny, like-new, CM set that only gets used for weekend oil change work at home......