Hard to give a good answer without more info. What kite are you looping now and what is your looping style and goal and I assume you mean hooked in and ...
since any kite can loop the question is how much power do you want out of it and how fast do you want it. if you really want the full power then definitely the fuel is the gold standard- even a down loop on that will get your attention. I will admit I only loop those with medium power - no way would I pull the trigger way up there with a fuel!
or if you're looking for a lower power loop (for soft landings, learning, or just more for style points) then you just want a fast turner that doesn't generate loads of power. lots of bridled kites and open-C designs are in this category but there's a lot of variance and demos are advisable.
Exactly. I dont get how people can just throw out something without asking OP what he is looking for.
Every kite will loop, now what you are looking for in the loop will deterine what is the best looping kite for you.
So if you want a fast horizontal pull or a kite the whips around with less power and than can be more controlled..these are two completely different kites.
I am going to take a stab at saying you might not have extreme options when it comes to demos...so here are the kites I am familiar with:
Torch. C kites. Will break your neck. But an awesome pull from even innocuous situations. Super fun but crazy for us normal riders.
Bolt full on control. Will loop easy, but have just a bit of pull...can be depowered through the loop great kite when you are practicing stuff.
The Ride is very similar. Has slightly more pull in the loop. Bonus is that this kite only has two struts,...super light and killer fun.
2013 Park: Somewhere between the ride and Torch. The new park has a bit more pull, but still very very controllable. Not much of 0 to mach speed like the torch...but much more pull than the ride. Also this kite is super stable in any kind of wind. Good times.
just make sure you know what you want out of the kite. there is no one best kite for looping..they are different. THis is a good step, but think about what tricks you want to do with it.