New Spedo or JDM cluster? HELP!

[INeedNewTires]

Hey i'm trying to figure out which id rather go with. My odometer isint working but the speedo is, from everything i've searched i've concluded that i should replace the cluster. Now my question is should I buy a JDM S14 cluster and do the soldier trick where the km/h will read in mph.... OR should i buy an aftermarket spedometer and somehow figure out how to integrate a junkyard odometer or maby attempt to fix my current one.

All that being said, the reason i ask is how accurate is the OEM gauge over 100 mph. I've always heard their WAY off, which may have been some domestic bullshit or maby someone who didnt know shit told me that along time ago and it just stuck in my head. Either way i'd like something thats relatively accurate at higher speeds, but also is somewhat simple to install and aquire. I have a JDM cluster lined up but the dude wants too much for it IMO. So i'm looking into aftermarket speedo's but havent found anything that fits just right yet.

Any suggestions, comments, or help is greatly appreciated. thanks!