Actually DVI cables produces the same quality. But of cuz dont buy those RM5 type la. Those might have lesser copper cables in it.

The problem when buying DVI cables is to choose the right type of cable.

In the market there are DVI-A (analog),DVI-D (digital),DVI-I (digital and analog).
For DVI-D and DVI-I there are 2 types namely, single link and dual link.
For single link, u can get max resolution of 1920x1200 @ 60hz and for dual link it can go to 2560x1600 @ 60hz.
So comes the question u might wanna know, do i need a single or dual link?
This depends on your equipment. Check with your equipment documentation. If you are not sure which you need then purchase the Dual-Link cables. Dual-Link cables are backwards compatible with Single-Link so they will work with both connection types.

Happy choosing 

According to Samsung's website, it shows that ur model is using DVI-D.



Look at the image above, the female connector can accept single link or dual link. But since ur 2233sw max resolution is 1920x1080, no use to get dual link also. Just get single link enough d.

I suggest u bring a picture and show to the shopkeepers cuz some of them are not so well versed in these stuffs.

Digital signal doesn't supports the adjustment of screen sizes, tilting, zoom in out, wider, taller or etc. It is automatically fit to your screen size. If u wanna adjust those, it is only available for analog signals.
Your problem is you can't use Magic Bright?

By right or design... you will not be able to fit a DVI-I socket into the DVI-D input on the monitor.... the 4 analog pins (above and under the flat/wide metal pin) will impede insertion.

The only connector needed (for a sub 2.4Mpixel monitor with a DVI-D input), is a SL-DVI cable.....