Hello, and a warm Celtic Welcome from Boston, Massachusetts. I am kilted every day, and only a few stops north of you on the commuter train. It must be something about New England as I am also long in the torso and short in the legs. At 6'1", it has always boggled clothiers that my trouser inseam is only a 29. My spouse has referred to me as the human hot water bottle, for all the heat I generate on a cold winter's night.
My experience is that my Utilikilts(UK) tend to be way too warm in the summer months. I have a few Amerikilts that are cool, but have no pockets, so a sporran (matching cloth one comes with the kilt) is required. Of the Wizard's products(FK), I have an older model with snaps in an olive colour. It has decent pockets, and the material is such that it is fairly cool to wear on warm summer days, and it only takes a very slight swish to cool it off even more. I have both a standard and a thrifty from Stillwater Kilts (SWK). The standard holds enough heat that I wear it while out shoveling snow on the coldest day of this year and still am rather toasty. The SWK thrifty is very light weight and a lot cooler, but no pockets.
I have two Sport Kilts(SK) which like the SWK thrifty have velcro closures (great for fluctuating waistlines). The SKs are amde of Polyviscous and are easy care and each comes with a small pocket on the inside apron, Seamus did put a larger one on one side of my apron as a custom order thing. The SKs are very cool and are great for me when competing in the caber toss.
The USA Kilts(USAK) casual line is relatively cool and works well with a pocket sewn on the under apron. Mine holds spare reeds, hemp and assorted spare parts for pipe training. Velcro or straps are options.
Now for the important facts.
FK,and USAK are made to measure high quality kilts.
UK, Amerikilt, SWK are straight off the peg kilts
SK is off the peg, but Seamus is great to work with for customizing.
I do not own an Alpha Kilt or a Union Kilt, so I can not compare them. Both look to have some nice features for your application.
Keep an eye on the board for a Kilt Night in the general area, to meet and greet with others in the kilted world.
Welcome to the addiction.