Apologies - I obviously got the wrong impression (that you were looking for nitrification products)! I'm not going to be much help on products that are available, but your approach in picking reputable companies sounds perfectly reasonable for me. If you were in AU, I'd recommend Aquasonic, a local company which makes high class products but strangely has a very low key reputation amongst hobbyists.
An additional small suggestion for when you start up the next tank - if you can find someone who has a well established tank already running, get 'em to do a good gravel vacc and dump all the mulm in your (clean) substrate. I think you will find that you can transfer a heck of a lot of beneficial microflora this way. May help if you have them all in there from the get go.