Gday and welcome to the forums . . .
Im not quite sure where you read that about Spec Cases, but as with everything on the internet you will find more people complain about a product than those that praise a product, and if you have read this 2-3 times, remember that is 2-3 times out of 100's, maybe 1 000's/10 000's of Spec Cases that are sold.
I recommend the Spec Case. I have had one for my 13"MBP and have NEVER had a problem with it.
But regarding what you want, do you want a Hard case, Soft case, a Portfolio type case ?? What ??
If you are looking for a all day everyday case that you can take anywhere i highly recommend the
TwelveSouth BookBook for rMBP.
I have one of these on my iPhone5, (had one on my 4s), have another on my girls iPad3Gen, and one for her MBA. For the price, i wouldn't have hesitate in paying that much originally for my iP4s if i had of known the build quality.
TwelveSouth only make accessories for Apple Products and there quality is only 2nd the products that do make. Its beautiful to look at, it is well made, Protects from drops and in general it just a well made case . . .
Images.
There are a plethora of cases out there, but over the years i do like and will keep using TwelveSouth products. Not Just the case as i have the PlugBug, the BookArc Pro, and I'm in the process of purchasing the Surface Pad for my MBP . . .
In no way have i any affiliation to the company, I'm just a very happy customer
HTH
Cheers