Sig's don't all cost $1000+.
My P228 cost me $550.
About about to pick up a SigPro 2022 for $400.
The Sig P250 line can be had for under $400 WITH night sites.
The only Sigs that go for over $1000+ are the custom ones. Even the Elite series guns are just under a $1000.
Sig and H&K handguns are similarly priced.
If you classify H&K as less than a Sig, then you've obviously never fired one. I've fired H&K's in 9mm, .40SW and .45 and they are all fine weapons. Personally, I like the paddle style mag release over the button style.
When it comes to firearms there is not a Top manufacturer that is quantifiably the best. It comes down to personal opinions of the features offered.
For me, my HK is slightly more accurate, and I prefer the mag release over the button type that Sig has. The Sig has better recoil characteristics because it is an all metal gun. And the DA/SA trigger on the Sig gives me 2nd strike capabilities, where as the LEM trigger on my HK does, the follow up trigger pull is extremely heavy.