Benchmade Nimravus fixed blade. Love it, except that the sheath button release is backwards for how I release it.
Benchmade auto folders are also awesome. I've owned two, loved both, but lost both.
A knife company that comes highly recommended is Strider, which will be my next knife... but they're even more pricy than the benchmades.
Danner ain't bad (and can actually be worn in a Marine uniform), but my favorite pair so far is my current deployment boots: Rocky's VS2's with green superfeet insoles. Comfy Comfy.
SmartWool. Great socks, comfy, breathable, and I have worn some pairs multiple days in a row in Afghanistan (including patrols) without problems. I rock the "Ph.D" and the medium cushion hiking models. They are very expensive though, at nearly $20 a pair. Can be found at REI and other stores.
I'm in civvies a lot (I've worn cammies 9 days total, over a five month span), but on deployment, I love my frog cammies (Marines).
And the Frog fleece is money. I have been searching the surplus stores to find one for personal use, since it looks like a civilian fleece.
I almost exclusively wear underarmour boxer briefs (red or gray band, not the blue). Comfy, wicks sweat, and smells better than cotton ever will after a week of patrolling. No, they're not flame retardant, but fiery explosions are far less common now, and everything else I wear won't ignite me. I risk it.
Oakley. Get on standard issue and get you some.
I have and wear a suunto, with all of it's crazy compass and altimeter and barometer madness. My personal opinion, after having mine die on me mid-deployment... is that the money spent really isn't worth it. Get a g-shock with compass if you want to be highspeed, or just get a $30 timex, which works just fine. I wore a timex $35 watch for four years straight with no problems at all, until the strap broke. Damn good watch.
Most of us can't choose, but for the Marines who can do this... take the MTV cummerbund, and put it on the eagle plate carrier we get issued. Then take off the shoulder pads, and tape some good soft foam on the straps with tan duct tape, while still allowing it to unbuckle. This makes it smaller, more comfy, and...well....higher speed than the normal fobbit.
Can't choose 'em, but I bought one of those tan elastic bands for the helmet, and wrote my name, last 4, blood type, kill roster number, and NKA (allergies). Works great for that type of info.
Magpul Pmags. End of story.
But, if you're not able to get them, then get yourself some magpul followers for regular USGI mags. They help a ton, and pass the "push down with finger" test, which most all stock mags fail.
And the combat fanny pack trumps all.
....and I'll add more to this as I think of more.