I am looking for a new set of irons. I hit these two clubs the other day and both were great. I had never hit a blade before and I hit it very well. I was unsure the distance I was hitting the 6 iron. Any advice on these two clubs

Personally, I'd go with the 704s as opposed to the 690s. Both are great irons for strong players. Why play a pure blade when you can play a forged cavity back that will give you the same feel with a bit more forgivness? In my opinion, blade players lose out on forgiveness when there is no need to. Feel is great, but nobody strikes the ball perfect everytime. Many of the world's best ball strikers are going to clubs that offer some forgiveness. I'd recommend you do this as well.