I think everyone is overblowing the importance of suiting. Yes, you have to look professional and put together, but black vs. navy, or monkstraps vs. laced, who cares. Find me a quote from someone who does interviews where it says they were affected by the kind of suit an applicant wore.
Suiting refers to the fabric that suits are cut from, not the suit itself btw.
Regarding the rest of your post, you're missing the point.
The point is to stand out for your application and thoughts, not for some ostentatious clothing choices. I completely agree with the poster that stated that you shouldn't wear something that BB doesn't make with the caveat that everything they make is not interview appropriate. I was going to make the comment that BB doesn't make peaked lapel suits other than tuxes but realized that J. Press, another american trad staple, does make them so figured it was moot.
I frankly don't care how you dress. In fact, if I see people dressed like GQ-wannabe's then I'll laugh, because all it takes is ONE high ranking interviewer who has an opinion on this kind of stuff to find a reason to dislike them.
Also, try not to buy a suit that's too big or small for you. Button only the top button of a 2 button suit. Avoid 3 button suits unless they're 3-roll-2, in which case button only the middle button. Spend the money to have a tailor fix your suit if you need to have it done. Your pants shouldn't puddle on the floor and with your arms at your side you should show a sliver of your shirt sleeve past your suit sleeve. If you button the suit button and your suit has an 'x-brace' and looks like it's pulling, then it's too small. You should be able to just about fit your fist in front of your stomach at the buttoning point.
Avoid pleated pants, especially if you're tall and skinny. If you're short and slightly stout, then it might not be a bad idea to have them them depending on how flat front pants fit on you.
For ties, avoid shiny satin finishes. Like another poster said, red is a no, but a more tame burgundy is awesome. Bonus points if it's grenadine or faux grenadine. Repp stripes are okay as long as they're not gaudy. Neat patterns are great.
Practice tying a knot. A four-in-hand, a double four in hand, a half windsor, or a pratt knot are all acceptable, but my preference is for the first two. Full windsors are blah. And the first two knots will work for 95% of all situations including a med school interview.
I work with a LOT of doctors. Most of them dress like crap. I think surgeons dress better than medicine folks, in my experience. However, it's important to remember that you should not out dress your interviewer. That looks bad as well.
On that note:
-No vests
-no bow ties
-no bright socks (match to pants),
-simple watch if you're wearing one preferably with a leather strap. No watch is better than an ostentatious one. I'm thinking of picking up a formal watch for interviews since I think that my daily watch is bit much although it's reasonable.
What are your thoughts on the micro pin stripes. I have several of those and I greatly prefer them to solid on my frame.
You're an attending it seems. I think you can wear whatever you want, but if you're interested in looking better for what you have then make sure the stuff actually fits. My old boss is a super super super nice guy, but he always wore these awful gigantic unvented suits that were 5 sizes too big for him.
A good tailor is worth their weight in gold. A few simple alterations can make an inexpensive suit look like it was just about made for you.
