It seems you are reading my mind! Of course a 3 piece can be worn without a tie. I did that today and quite like the result.
Actually, I think you are right - with this suit color and shirt combo, you actually pull it off quite well. But I'm not sure I would try it with that new suit of yours.
Thanks for the compliments. This suit has a very faint herringbone, and I agree with you that it is tricky to pull it off a 3-piece sans tie. One of the perks of working in the intersection of Academia and the Business World is that sometimes I can try different looks without being out of place.
^ is that your Star Wars square? It works well here IMO. Actually, I see some nice stuff all round generally being posted today.
Wore this new jacket with white/cream trousers last week, but I'm still in the stage of experimenting to see what colours work best with it. It works surprisingly well with mid-grey, which I didn't expect on purchase: