Here's a shot of our kitchen.

The recessed cans are MR16 50W Halogen.
They have a color temperature of about 3000 degrees.
The undercab lights are LED and have a color temp of about 6500 degrees which is why they appear to be much more blue.
Probably too blue for most.
We like the look of the higher color temp with our cabs, backsplash and countertop.
It also feels like the light is much brighter.
Just as a point of reference, incandescent lamps have a color temp of about 2600K.
Halogen is about 3000K
The difference of a few hundred degrees of color temp won't be all that noticable unless the lamps are next to each other.
I would, though, consider what effect the 2700K lamps will have on your white marble countertops.

I have 2700 LED's throughout my home. I prefer the warmer color but if I had the 3000 not sure how much I would notice the difference.
HD has good pricing on Ecosmart LED's that are made by Cree. When I looked at Cree lights at a lighting store they were more than twice the price.

Thanks so much-- very helpful!

willtv- What do you mean about "I would, though, consider what effect the 2700K lamps will have on your white marble countertops".

I don't know enough about lighting to draw a conclusion here : )

ps- my cab guy is going to do my upper corner like yours! Thanks!

What I mean is that 2700K lights are somewhat yellow when compared to 6500K light which are very blue.
If your countertops are dark, like mine, it doesn't make too much of a difference.
But your countertops are white which will make the color temp more noticeable.
I'm glad the cab thing worked out.

So you think the 3000 may look better with the white countertops?

I think so, but everyones' color perception is different.

Fishies- the 2700 look very similar to traditional lights. I wanted 2700 but DH said light should be white and not yellow.
So we have 3000 led ights for uc and cans but traditional decorative lights.
All are on dimmers.
If you have any cans in your current kitchen, might want to plop in 2700 and 3000 to see the look.
3000 take some getting used to but liking them.
I think I would definitely go with the 3000 for uc but since you like yellow hard to say for the rest of the kitchen

Thanks-
Maybe being we have a lot of yellow in the kitchen the 2700 lights would be overkill. Perhaps the 3000 would balance that out and make our contrasting whites (upper cabs and countertop) look better.

Have you posted this on the lighting forum? Or done a search there?