Do you have a plastic taste, or is it just time to replace because cleaning is no longer helping?
I'm not sure what reviews you're reading, but regular NSF beverage grade tubing should be sufficient, and is rated for pressure. You can get fancy with the antimicrobial beverage tubing, or the stiffer barrier tubing like you find in commercial applications.
Make sure all liquid lines use the same tubing though. All three of the above mentioned offer a different resistance value, and that will need to be taken into consideration when determining the proper length.
I've been using this stuff for years, and have never had a complaint: https://www.northernbrewer.com/collections/beverage-gas-tubing/products/3-16-id-beverage-tubing