<I have started to write a response and it disappeared - boo!>
Thank you all for the responses. As I thought the white blazer and black tux are the closest options but still not ideal.
I don't have any interviews to go to but as Jules mentioned at mid-career it can change at the drop of the hat and the least thing I want to stress about at that time is what to wear. I want to be ready! For the last 2 years my work environment was very stressful and draining and I feel that maybe it is a time for a change - especially as I have been working there for over 10 years.
I am not in a senior management position but in a senior technical position so dress code is not as strict but still I want to look professional without being too corporate.
Also Angie demonstrated that classic suit has a good longevity and can be very modern - all depends how you wear it - so I have no doubt that I can make it work for me outside of the interviews too. Possibly it is a good thing I did not get it before as with my current weight loss it would be too big now but I think it is time to start looking. Maybe I can find it in Seattle?:-)
I don't want to hunt for it at the last moment because then I am bound to compromise and get what is available and not what I really want. Also remember that I am not easy to shop for because I am taller than average: most of jackets are just too short on me. And trousers too!:-(
Suz, you don't have many summer jackets because you do not need them as much as I do. I run cold and have blasting A/C in my office so blazer is a summer staple for me. You run warmer and work from home with no A/C so your need is different (although I will gladly enable you to get more jackets)!
As for my denim jackets I did not show them on purpose as they are definitely not appropriate (and I still have white denim jacket although my faded biker gets much more wear this summer).
Susie, this is exactly what I meant - need to be prepared!:-) What a lucky buy for you!
Yeah, I need a navy blazer (suit) YLF shopping session!