1. Don't bother with a suppressor, they add weight and unnecesary length to your gun without a gain in performance or drop in noticeable sound
2. grip, I would advise against the grip-pod, mine broke literally yesterday. I have used it maybe 3 times in the last year I have had it. Some folding grips can feel sloppy, so are not good to hold onto, I would reccomend one of the simple circular grips rather than another pistol grip at the front, for me they just feel 'right' and give stability and manoeverability that other grips could only dream of.
3. for a decent torch set-up look on deal-extreme (google it) some come with rail mounts, and they should say so in the description, just be prepared for a wait on the delivery time (not that they are slow, they are just in hong kong... I think) and get as many lumens as you can, also if you can get a torch with a tail switch, brilliant, if not get one at the same time that says they can be used together