This may be obvious, but don't necessarily insist on buying a 6300 champion, as prices are only based on recency, and not related to their strength/enjoyability. There may well be champs that you'd love that are much cheaper, so be sure to look over all your options. Better to get the cheaper ones sooner rather than later and potentially let the more expensive ones fall down price tiers.
Watching high elo kayn players always makes me want to take up jungle and in turn kayn out of the things you mentioned though.