MK Horns
I use the MK horns...They are sexy looking and light....I also use the MK ball bearing clevis connectors and the MK ball link connectors....They are not the cheapest setup but they are in my opinion the best horn's out there....
Tettra or IM products makes a horn that is a bolt with the Aluminum threaded nut that captures the bolt...Also has a finish washer for the bolt head side of the horn....These look decent and are a touch cheaper....
These are available from Central Hobbies.
For control rods The Central CF rods are the tops....Use the Titanium ends and you have lots of choices for which thread and the diameter of the rods.....They are super light weight.....If $$$ is more of an issue than weight they also sell stainless steel fittings rather than the Titanium ones....These rods are the best available period......
If going to the giant scale stuff like 30%+ The Hangar 9 Titanium links are great too...they have a right hand and a left hand thread on opposite ends....so you can use a little wrench and tighten up the linkage like a turnbuckle.....This works good on the Big stuff but is not as light as the CF stuff....Even though I would venture to say its close to the stiffness of the CF ones just heavier.
Rocket City stuff is great on the big planes but pattern style models I like the MK clevis and ball links....
Troy Newman