death, I'm half way to a similar setup. Found my used 6-55lb suitcase weights off craigslist last year. 2 separate transactions 3 weights for $100. Cleaned, primed, repainted.
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Going with a setup like this
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Pro's, don't always need rear ballast, weights can easily be removed. Also doesn't stick out as far as the ballast box does, shed space is becoming a premium. I use the 3pt quite a bit, trailer mover, sprayer. I like the cargo carrier, can be utilized on upper gooseneck mount or lower receiver.
Con's, pricey. Weight farther out is better, but 330lbs should do it.
Originally bought a ballast box but later realized it would not work with my pat's quick hitch. Sold the box.