I toss Dextrin in most recipes, its cheap insurance to get good lacing on the glass, but im generally in the 3-4% range with it. It is probably not needed, its just what i have always done!
@Marley's Brewing
Hops wise, i would look for the more tropical hops: azacca, el dorado, mosaic, citra, etc. I really like Sabro as well. There are tons of really cool hops out there!
You really need to define what you want your final flavor to be: Tropical, citrusy, hoppy, etc. From there you can start to hone in on what flavors you are looking for.
quick hop scheduling run down:
60-20 mins are bittering
15-10 bitter, flavor, lower aroma
10-5 flavor, aroma
5-0 flavor lots of aroma
0-wp 180 aroma and tropical flavor
You can blend the hops and pick flavors that compliment each other.