Whatever CAT, distance should not be a factor unless you run loops around an a/c compressor, parallel the household 110V, or really butcher the splice. I've run cheap equipment across 200M over unspliced cables. For modern chipsets the 100M spec is as much to do with collision avoidance timing, and if this is a switched or one-to-one connection the collisions will be minimal unless it's all local two-way file transfers.
If it's just a temporary can & string, use whatever you can make work wherever you can get it.
If installing, use the latest you can afford. (CAT6) Anyway, CAT5-6 pricing is a tossup unless the vendor is screwing with you. CAT6 is often cheaper.
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There are a vast number of people who are uninformed and heavily propagandized, but fundamentally decent. The propaganda that inundates them is effective when unchallenged, but much of it goes only skin deep. If they can be brought to raise questions and apply their decent instincts and basic intelligence, many people quickly escape the confines of the doctrinal system and are willing to do something to help others who are really suffering and oppressed." -Manufacturing Consent: Noam Chomsky and the Media, p. 195
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