I have been frustrated trying to find a product that is spreadable yet truly trans-fat free. Plus I want a product that is soy-free AND affordable.
Land O Lakes Butter with Olive Oil is a good choice, though fairly expensive in my book.
I have been also able to find Soy-Free Earth Balance. But, it still has a lot of additives I would rather avoid, and it doesn't spread very well out of the fridge.
Here is a little tip I wanted to share for anyone looking for an alternative. It's great because you get to choose your own butter(organic, raw, regular, etc) and your own oil(I use Bertolli extra virgin olive oil-you may want to use a milder tasting oil).
All I do is get out my Bella Cucina Rocket Blender - 10029 and put in a stick of room temperature butter and 1/2 cup of oil. Blend until combined and creamy, pour into a container with a lid and put in the fridge. Voila! You have spreadable butter right out of the fridge!
Now, off to make grilled cheese sandwiches for the kids...