Depends I guess some people see underground as NFS, others see the games before that as NFS. If you want a proper racing game there's plenty of options as somebody else has mentioned. For the arcadey type it has been a long time coming for a game where you can fully customise like this.
Well, I don't think there are any other options on PC. Project Cars is nothing like old NFS, Forza Horizon is an X-box exclusive and Burnout is a 100% arcade havoc-wreaking racer. There are no games like NFS on PC at all. The closest we got was Criterion's Hot Pursuit, which was practically a cleverly disguised Burnout, (still very good, though) and TDU2, which was a bit pants.
Epic landscapes, varied tracks, lots of exotic cars and a great electronic soundtrack - that would be the franchise returning to its roots and something I'd really like to see on PC.
While the new Underground will probably be good, I can image the game getting stale pretty quick as we're yet again being limited to driving only at night and only in the city (which looks pretty bland, to be honest). The customisation aspect and the driving model itself will have to be really good to make up for that. Well, I guess we'll see how it pans out in November;p