maybe Gotham Ultra for headings, Whitney Light for small pieces of text, and either Mercury or Miller for paragraph text?

or possibly Gotham, Benton Sans, and Miller? Anybody?

You should't use more than one sans serif, that will look like you can´t decide.
Why not use Whitney for both headings and captions, and then maybe Mercury for longer texts.

I like the look of Whitney in smaller sizes a lot, but I don't like Whitney's angles so I don't want to use it for headings. I want to use Gotham Ultra in all caps for the headings because I want something that is modern, simple, geometric, and somewhat architectural. Because it's for an Industrial design portfolio, where the headings are all that are going to be read during the first look through, the headings typeface is very important to me. Having said that, I don't like the look of Gotham for body font, so my hope was to use only capitals for titles, and then another font for the short captions. I am aware that this is not common practice, but was wondering if there was a way to make it work?

I'm looking at Benton Sans as a way of meeting in the middle, and using it for headings and body text, but although I like it for body text, I wish it was more geometric and came in as thick of variations as Gotham does.

Is there a font similar to Gotham that also reads well as body text?

FF DIN, HTF Verlag, Neutraface may be alternatives!

Thanks for the ideas. Verlag was an option I looked at originally, as was FF DIN. Wasn't exactly what I was looking for. I did recently see Alright Sans, and I think I may go with that. It's almost everything I like about Gotham and Whitney combined

I am just a font civilian but I have a similar dilemma/trilemma...

My self-pub book will have this as the primary cover graphic...

http://www.mediafire.com/?rkxxrc9599dle6n

I was keen on using Gotham Bold or Ultra for the cover and chapter headings, and Gotham Book for long text passages, and Gotham Light Italics for short vignettes of a few sentences to a few paragraphs that break up the text.

But the comments about Gotham's unsuitability for text give me pause.

So, I guess the go-to solution is Mercury or Miller... But if I am doing that I might as well go for (much cheaper) Proxima Nova instead of Gotham...

Appreciate any suggestions for achieving a hip look.

Gunnar