I'd be careful buying in the $2K range... that's more expensive than a good working suit but not expensive enough to buy a suit that lasts forever.
I get best results going for a mid-sized, mid-range custom tailor.
Here in Knoxville, we have an "American Clothing" store (I don't think it's a national chain). They'll sell suits in the $600-$1800 range. You can go in there and buy a very workable, custom-made suit for $1,200ish dollars.
Suits in that range look great at first, but won't last as long. If you travel much it will be dead within a year or so.
Now if you absolutely must have a suit that lasts, your only hope is Europe. I have suits I bought in the late 1990's from Amsterdam (Boss brand) that look like they just came from the store. But even then with a very strong dollar (pre-euro), those were $2,500-$3,500 suites. I bet they'd be over $5K now. They use better materials, better stitching and more components in their suits. There really is no comparison.