archer,
First off, if you don't have someone close by that you can depend on to coach you, I wouldn't consider the non-kit approach. After all is said and done, if you are depending on a bunch of guys on graybeard or where ever to steer you and they just can't give you hands-on help like someone watching and guiding you.
These kits, especially the RCBS kits I'm familiar with, have quality parts and you won't need to upgrade them unless you become proficient enough to move beyond a single stage press. Now if you are going into pistol reloading, that might be a different story, but all that you listed with the exception of the 45 long Colt are rifle cartridges. The basics are covered in every kit:
single stage press, powder dispenser, beam scale, trimmer, shell holder and funnel, primer loading tubes (2), lube pad w/ lubricant and brushes, reamer/deburring tool and a great reloading manual.
Will you need more? Yes, besides bullets, powders and shells, you need caliber specific dies, shell holders, a good dial caliper, a bullet puller, a good vibratory cleaner/polisher, at least a couple more loading manuals and a trusted teacher to answer those questions that are bound to come up.
In my humble opinion, the kit is a great way to get started.
Jim