It is not too often that I have to pull out the dress shirts from the closet and don my business casual attire, but it seems I have been doing it more and more recently. When I do I always seem to be stuck with the time honored dilema of choosing the right undershirt. I like an undershirt because is provides sweat protection and offers an additional level of comfort under my dress shirt. I don't like it though because I feel it looks kind of ratty when you are able to see the undershirt (This is a new. Maybe I am going for the more metro-look here) In this regard I see a a few options each which present their own pros and cons. 

1. the sleeveless undershirt aka. "A-shirt", "wife beater". We all know this one and seems to have been the choice of our Grandparents generatation. I like the idea here of an additional layer and not being able to see it above the collar of the dress shirt, but it does not seem to afford much in the way of sweat protection
2. the traditional t-shirt undershirt with the straight-across collar. I like this one and it is my fall-back because it is comfortable and offers a lot of protection, but I am not sure I like the white collar sitting above the dress-shirt collar
3. no undershirt. I have been trying this one out recently as I was trying to see how I liked the look of no-undershirt showing about the dress shirt collar. I have to say I didn't like it. I felt almost naked and without the extra level of sweat protection I felt nervous if I had to go into a stressful situation
4. the v-neck. I have not yet tried this option, but I think I am going to give it a shot. It seems it would offer the sweat protection I desire, would not show a collar above the dress shirt collar and would give the comfort of the traditional t-shirt undershirt.

Is anyone else faced with the same questions when you put on a dress shirt?  What do you think about having the white part of the undershirt show above the dress shirt?