What are some expensive suit brands?
I'm going to move your thread to the new Menswear Advice forum, where it will have more visibility, and where other members can benefit from your question.
Is expensive + high quality + ready-to-wear your criteria? If so, Brooks Bros is pretty moderately priced. I can easily find you Kiton or Atolini for $6K+. If you want to go bespoke, we could go to Huntsman, which have high prices, even for the Row, and get you a suit for $10K+.
If you want to go trendier, you can opt for Tom Ford.
Not sure if this is really where you want to go.
What's your budget?
Maybe you would like to consider Made to Measure options...
Ralph Lauren (not LAUREN Ralph Lauren Green Label)
Hart Schaffner & Marx
Options I would personally not recommend
I personally love Oxxford suits, and find their styling to be both classy and just a smidge flashy. You definitely stand out in one.
I like Kiton, but really only their summery stuff. They can be super flashy and over the top though.
Canali are a solid choice, and you'll get a good value for what you purchase. Very traditional, if that's what you're looking for.