If you are going to uni
(I hate to say this ... desktops are always more versatile ....) but you might be better off looking round for an old second hand monitor just to put you on - and spending your money on a laptop to take to uni.
you'll probably be in halls first year? - but then digs .... so you are going to be "moving out" every term end ... and desktops just aren't designed to be moved too much.
To answer your question .... wide screen rocks ....
I have a verrrrry cheap 22" mirai monitor .... and it's excellent
If you are upgrading anyway ... most PC sellers will just sell the box ... so getting a half decent monitor first won't be a waste
A usb TV doobie turns it into a quite respectable TV.
again ... if you are going to uni ... a lappy with a decent screen can be your entire entertainment centre - games, music, tv
(btw ... you were supposed to unplug the monitor to see the connector!! - digital was indeed unlikely ... but you could have added a newer graphics card .... )