TPN or TPN+ are widely regarded as very good
Listing out all the plants you have and if you use C02 injection or not will also help with your question.
If it's definitely pre-made liquids you're after -
If you don't have many fish - Tropica Plant Nutrition+ or TNC Complete
If you're well stocked - Tropica Plant Nutrition or TNC Lite
If you're not using an enriched substrate and fancy giving that a boost you can go with Tropica Plant Nutrition+ Tablets or TNC Plugs
I'm unsure whether to go for the TPN or TPN+
I'm going for quite a few fish, but also having quite a few plants as well. Will it be a big deal if I make the wrong choice?