The first pic looks like 18" black FR500s (similar to the ones I'm running).
The Chrome '03-'04 Cobras are 17s.
I really like the '03-'04 Cobras, but I will lean towards the 18" FR500s. I've been running 18" wheels on my Stang for many years (Y2K Chrome Cobra Rs and now the black FR500s) and love the look of this size on 1st & 2nd gen SN95s. I love the staggered look too.
Something to consider when going with the 18" rims is the cost of tires will definitely go up too. So, if you are on a budget keep that in mind.