I assume you are referring to an equipment kit rather than a recipe kit. That being said, I believe just about any kit is going to have the basics. I noticed some kits now have a cheap one use thermometer rather than a true submersible one. That might be an upgrade you want to consider. Other than that, you will want to replace just about everything you receive in a kit sooner or later I'd imagine. The cheap buckets get replaced with glass, better bottles, or conicals. The hydrometer gets a nice colander. Your capper gets replaced with kegs or a bench capper. You will want to get a nicer brew pot eventually I'd imagine. Then there is the chiller, most kits don't even have one, although the kit I started with (more than 10 years ago) had a nice immersion chiller with it. Of course you will eventually want to move to all grain which is a whole new load of loot to buy.
OK so what does this mean? I doubt you will get the end all product you want out of any kit. Accept the idea that you need to order each item, or will want to upgrade eventually. I'm sure some other folks will have more positive response.