I don't like kits. None are complete anyway, there are always other things to buy. No brand has a lock on "the best" tools so why not go for the best item for the money to start with?
Most eBay used reloading tools sell for more than they cost new from any one of several mail order suppliers. Saying RCBS or any other brand is better than Lee without saying exactly what's being refered to - and why - is pointless; RCBS has an aluminum alloy press that's no better than anything Lee sells. That said, I would NOT reccommend Lee's Challenger for reloading large rifle cartridges but their Classic Cast will easily handle up to the .50 BMG. My young friend's cast iron Lee "Classic Cast" press is equal to and better in some respects to my much hyped Rock Chucker.
Lee's dies produce as good ammo as anyone's; I have some 50+ die sets dies from more than ten makers so I know a bit more about that than most web experts. Lee's simple case trimmers work as well as any and, done correctly, are a whole lot easier/quicker to use than the adjustable but more costly hand lathe types.
Lee's "Perfect" powder measure isn't perfect but it may be the best measure available for coarse, large grain rifle powders but it can be difficult for some people to use really well for fine grained ball powders.
BUT - while Lee's little Safety Scale is very accurate AND very sensitive, it is without question the biggest PITA scale to use I know of! ANY other beam scale is excellant for reloading and, used correctly, beam scales give away nothing in accuracy or speed to any costly/quirky digital powder scales. (How helpful a digital powder dumpster may be lies with how fumble-fisted the user may be, klutzes do benefit from the very expensive auto powder handlers.)