I agree with getting samples - it can save you a fortune as you'll avoid buying expensive products that might not work for you - the shade could be wrong, the foundation could oxidise on the skin or make you break out or just look terrible on you.
I'm not a fan of full coverage foundations so my experience is fairly limited, but I have Clarins Everlasting and I've been using it a bit.
It is decent enough, but can look very cakey, especially in fine lines and on dry areas.
It doesn't cover my freckles and is not completely matte which I like.
It doesn't wear as well as I'd like - on the oilier bits of my face, it seems to separate or split a bit, and on the drier bits of my face it seems to enhance everything I don't want enhanced like fine lines and dry patches.
It seems to contain a lot of perfume - I can smell the foundation for a long time after I've applied it.
For similar coverage, I prefer Diorskin Nude which I think looks better and more natural on the skin. It might have a little less coverage but it just looks better all over, doesn't enhance dry bits and fine lines and generally just looks awesome.
I've used this one for years and I just don't have any complaints.
Estee Double Wear is full coverage, but there's a Maximum Cover that might also be an option for you. I haven't tried them, but have heard so many awesome things about both foundations. I do have Estee Lauder Double Wear Light which is brilliant - it's light/medium coverage and matte and worth the money.
All three companies have always been good at giving me samples.
You could get the samples, test and decide on one and then buy online.
I don't know if it'll help you at all but I have:
107 Beige in Clarins Everlasting (which might be a tad too dark at the moment - I think I bought it during summer)
010 in Diorskin Nude (perfect for me right now - it is more neutral than the other two)
ELDWL is Intensity 0.5 (perfect for me, but more yellow than the other two).
Mac Face & Body in N1 also seems like a perfect match.
I have a sample of the Rimmel Lasting Finish foundation in 100 Ivory and it looks like a perfect match for me.
I've had a few Bobbi Brown foundations and they are terribly yellow on me.
I wouldn't buy anything without at least having had a look in the store, but it might give you some kind of idea if they'll have a shade that will work for you.