I've flown the 2011 16m switchblade and it was honestly more difficult to get going than my 12. With the smaller kites you can work them a bit (not much since they're slow to begin with) to get going but the 16 felt so big and heavy I couldn't make it work. I am out and riding downwind powered on my 12m in 12mph going upwind in 13. Im also almost 50 lbs lighter than you so maybe you'd get more benefit out of one of those tanks than me, but if I were to get a kite that size I'd look at something light wind specific like a turbine.
Crossbow may be a good choice, I know they race on 16m+ ones but I've only flown a 12 for a few minutes
I tried the 16m xBow and honestly I didn't like it very much. I am really into LW since this is what we get for a big part of our summer so it is not because I dont like big kite.
It really feels like a "heavy kite", also the depower throw is too long for me , I was riding with my arms totally extended. It is also very very slow.
I would think that the 16m xBow would be appropriate for a big Guy. For LW If I was into xBow I would take a 13m LW but If I was a lot bigger - heavier than I would choose the 16m xBow.
Take Blade Big Mama, Epic Infinity, TS 17m are much more fun LW kites in my opinion. I dont mind big kites but I dont like big and really Slow LEI. If I have to go with a big Slow LW kite I will choose a S3 19 or 21.
In my Case I have 2 LW kites : TS 15m + 21 m S3.
PS: I really loved the Lithium LW specific kites, they are a lot faster than the xBow and have similar or better LW performance without feeling too heavy.