I love my 32's, good weight, super comfortable. Haven't rode the Vans but if the 32s fit well, I'd say go with them.
btw why the fasttrack? I personally use the traditional laces and much prefer them. You can lace em up as tight or as loose as you want, and they stay at that tension the whole day. I dunno about 32s fasttrack system but I've heard of a few other brands' fasttrack systems getting looser throughout the day. It's only about 20 seconds longer to lace up the laces at the start of the day so unless you're constantly taking off your boots throughout the day, I can't imagine it being worth it.