I don't even bother with store-bought kits. What I do use is an old steel GI .45 rod (loop handle, threaded for 8-32 brushes, and brass jags. The longest barrel length I have is 5" and it's long enough for that. If I needed longer I would probably spring for a Dewey rod or some such. I buy my brushes, etc., from Brownells and use their .30 caliber GI patches. All will fit nicely in an old classic cigar box. It will even work on my Triple Lock Target so I guess it has what it takes.

What's different is a revolver cleaning rack that I got the plans for from a police academy--holds K and N frames while cleaning.

So for me, that's the "best". Probably not according to a sporting goods salesman, though.