Good to hear your Holter testing went well!
I have HBP also, have been on Micardis 80mg for the past few years and as of last week, I've been cut back down to 40mg!
The one diet thing that helped me the most was doing the DASH diet. It is all about cutting salt out of your diet. I had to because of kidney disease.
You stated you already follow a low salt diet, but do you eat a lot of pre-made, processed, and restaurant foods? That's where so much sodium is hidden.
Also, losing just 7-10% of your Over weight pounds can reduce your risk of diabetes and heart disease?
I have a chart from my dietitian specialist for how many calories and how many fat grams you should be consuming an a daily basis if you are interested. Getting enough of a combination of whole foods is also important. In fact, I need to go get some lunch right now.
I'll be happy to share the calory/fat numbers if you like.