If your going to buy a bp monitor, and have any arm size, be sure and get the big cuff. the standard ones only fit up to max 16-1/2 inch arms. I would get a good ol manual one from the med supply store instead of those damn digital ones. You don't even need a stethoscope to take your own bp as you can feel your pulse start and stop times.
the signs of high bp that I normally see in myself are headaches, sensitivity to the light, feeling my pulse in my teeth and behind my eyes.
You definately want to keep it checked and I believe anyone using aas should be taking their bp at least twice a week. Not only does high bp put you at a danger of stroke, heart attack, etc, but it will fry your kidneys. So be safe
FM