Re: on the verge of shopping for new desktop hardware, recommendations?

[IL Ka <kazakevichilya@gmail.com>]

Also ip a. Someday you may no longer have arp:
<https://dougvitale.wordpress.com/2011/12/21/deprecated-linux-networking-commands-and-their-replacements/>

Yes, "$ ip neighbor" (or "ip n" for short)  is the correct syntax on modern Linux. 

Thanks.