Congratulations..! :)

Now, for the 1600 ISO...
If I was able to afford those films while I was doing photography extensively at those great faculty times(4-5 years back from now), I wouldn't have to push process HP5+ (Ilford, 400 ISO) to 3200, and also 6400 ISO regularly (Using Ilford Microphen, and going against the manifacturer's advices).
'HP5+'es were provided by the photo-club of the university that I was attending then; I was a student with not so much spare money to buy those fancy brand - fancy ISO films...and I was an obsessed photographer for available light, especially in worn out and not-used buildings and in the hospital operation theatres.
And, those grains...
Sometimes it seemed to me that I was only shooting and printing images just for going for those grains, and what the photography tried to tell was of secondary importance...

Well, have fun with all those valuable films... :)