When it comes to nails OPI is the one for me. I'm talking lacquer not gel. I haven't tried gel at all so can't comment.
I have just bought this pink.
It seems quite a warm pink and one that is very current for this summer, thinking Pantone Rose Quartz, in fact I think its a perfect match. If nothing else of me is bang on trend (8 year old skirt, 3 year old blouse) at least my nails are as I return to work and back to black.
If you are looking for a particular colour, (such as this one called You Can Count on It) in OPI varnish then Amazon is a good place to search. The chances of a store having 'the one' is remote in my experience.