LOL, I just researched both of those wheels... the K1 TS was discontinued months ago & Tire Rack has been sitting on 2 of them... in GOLD... for quite a while. Only 16 lbs in the 18x7.5 size, so I had really wanted them.
Ended up going with the 5Zigens, but they weren't on sale for $150. Damn! That was only like a week & a half ago. LOL
5Zigen web site is very vague about weight, says 18-19 lbs for the 18x7.5's, but footnote says weights are approximate & vary by size. 1010tires said they are 17.5. I posted pics of the 5Zigens in another thread last week.
With the +43 offset, they look fine on stock suspension, but I think any sort of drop would require a fender roll to avoid rubbing on bumps.