In my humble opioion:

1. The overall graphic performance of VG151 is better than that of 151s (D-sub)although, with a good VGA card, the difference should be subtle.

2. The warranty and technical support policy provided by Viewsonic in Canada/US may be better than that in Taiwan(shame to Viewsonic or other similar Taiwanese manufacturers if this is the case).

3. The 151s has a slim and handsome outer appearance, so if this is a major issue to you and you also prefer the DVI , go for the 'T' series. But the price is more expensive, of course.

4. Conclusion:my personal order of preference---

1. Samsung 151(150?)T
2. Viewsonic VG151
3. Samsung 151S