Might as well put some input into this since I am addicted to Henshin Belts and Devices of all kinds.

I will start with the Kabuto Zecter.

http://www.youtube.com/watch?v=3CtNZ8vkm7E

Pros:
Nice shiny paint
"1 - 2 - 3 - RIDER KICK" Need I say more? :D
Great size, pretty much 1:1 on the show, maybe a bit smaller.
A good variety of sounds straight from the show.

Cons:
The biggest fault this belt has is that it doesn't have the "Clock Up" or "Clock Over" noises. This makes me sad...

Overall it is one of my favorite Henshin devices next to the Den-O belt, but that's cause I am biased and <3 everything Den-O.

I've only got the Accel Driver and TheBee Zecter, though I do own capsule Heat and Seig memories, a candy toy Kuwagata Medal and capsule switches 1-4. I would love to own more, especially the Kabuto Zecter and the W Driver, but those prices.

For someone who's never owned a Rider belt before, is it recommended that I get the Fourze driver?

^ yes, does everything it does in the show but turn you into a Rider!

See, that last part is what keeps me from buying these belts :lol

If you stack them up neatly, you can get around 110 at the very limit, as by that point you don't wanna really go past that.

But yeah it will hold more than the box says, it just depends on how you have them in there :lol

^This

I recently purchased the Deca-driver and the K-Touch so I thought I might give my 2 cents.

Deca-Driver

In my opinion, this is a very well designed belt. I really like the look of it. And the best part is that if your lazy and have the internet, you can print all the bar codes for the card reader to unlock all the sound effects.

K-Touch

A very interesting toy. It isn't as versatile as some super mode items like the Faiz Blaster but it still dose it's job.