Win2k had service packs, but there was different versions in another way: different products.
There is the desktop/workstation version, Professional. And then 3 different server versions.
I ran 2kPro back in the day on my desktop and gaming machine, and at some point put 2k server on my desktop PC. 2k server has terminal services, and if you change a few settings, disable some stuff, 2k server is a fine desktop OS. IMHO the best version of Windows for desktop MS released.
I recently put 2k Advanced Server on an Core2 laptop, it now dual boots the current Slackware64 version 15.0, and the 25 year old Win2kAS, which is kinda hilarious.
That laptop only has two cores, so 2k Server would have been sufficient for the hardware. But if you have something with 4 cores then for 2k you will need Advanced Server or Data Centre Server. I do not recommend DCS, I used it back in the day for the home domain controller. Normal service packs don't install on it, and SP3 was the highest I ever got: then all the rest of the patches manually. I mean dabble with DCS, but don't take it too seriously.
If 2k could run on the i5 I'm using now, I think I would have to use DCS or it would not be able to see all 12 CPUS (6 core, HT).
On NT4 I did the hack to make workstation into server, showing to me how there wasn't loads of difference (Personal Web Server would "change" into IIS, too). Same goes for the versions of 2000, they are all the same kernel and as such basically all support the same hardware. It sounds silly plugging a USB camera into a server, but it isn't really a server.... or the workstation isn't really a workstation.
To answer the topic, 2000 Server.