The steelbooks:https://www.amazon.com/Dragon-Ball-Blu-ray-Sean-Schemmel/dp/B08FVB3R6S present the series in its original 4:3 presentation

Wal-mart has the season blu-ray sets (which were stretch to widescreen and crops some of the picture out) for 3 seasons in a single boxset (there's 9 seasons total) for $35 ( normal retail price for a single season is about $22 so not a bad deal) https://www.walmart.com/ip/Dragon-Ball-Z-Seasons-1-3-Blu-ray-Walmart-Exclusive/807781505

If you're being price conscience I would go with the Wal-mart 3 for 1 sets. I don't think the cropping is going to bother you that much.