As far as bits - the Robart's Walking Horse bit is less expensive than the Imus bit and (IMO) made much better. My TWH will go in a Walking Horse bit or snaffle, though most of the time he wears the TWH bit and goes on very light contact.
I've had some bad experiences with Imus' products and her attitude when the "issues" were brought up, so from this point on I wouldn't touch any of the products she markets with a twenty-foot pole. Long story short, I bought one of her bits. Less than two years later, it had developed a significant separation on both sides of the center ball of the mouthpiece and I was concerned it would pinch my horse's tongue (at best) or break apart entirely while I was riding. I expressed my concern and was told that horses are "hard on equipment" and shouldn't expect a bit to last more than a couple of years.
That explanation may satisfy a novice horse owner, who would just shrug it off, figure that Imus knows what she's talking about, and fork over another $70 for a new bit. . .but I've been in horses long enough to know better. There are bits in my box that are probably as old as I am and they're still in great shape. I've since learned that other people have had similar experiences with Imus products, and had similar response.
Just keep in mind that, in the horse world, whenever something has a clinician/trainer's name stamped on it, it's going to drive up the cost but not necessarily the quality of the product.
Like Corporal, I am not a fan of the Wonderbit. I know someone who rides their TWH in one and thinks it's great because of the way the horse carries its head. Sure, it looks fancy but the horse was always so "balled up" it never moved forward freely and barely even gaits anymore.
The kind of saddle you get depends on what kind of riding you plan on doing. I have a Tucker trail saddle (Cheyenne model) that I love and will probably keep forever. . .though I might saw the horn off. LOL. After years of riding in an English saddle, a horn just always seems in the way. I'm not out roping anything, I don't need the horn for anything, and it just kind of seems to get in the way. My boyfriend also owns a Tucker (Plantation style) and really likes it. They're quality saddles and hold up well. . .higher end of the price range, but you get your money's worth.
There's a lot of debate about "gaited horse saddles" and I've come to the conclusion that the best saddle for your gaited horse is the saddle that fits your horse and allows it to move comfortably. My personal preference is something with a round skirt, instead of a square skirt, because it keeps the back of the saddle clear of the hips when the horse is moving. I have one friend/trail buddy who rides exclusively in an old McClellan saddle. Another friend rides her TWH in an English saddle (again, doing trail). It's just personal preference.
"Parelli horsemanship is just like painting by the numbers. You need absolutely no skill. You just put this color here and this color there, and when you're done, you have ... a mess no one wants." mp