I have, use, and prefer the Spire when it comes to high-end loaders. That being said, Rotors are getting very cheap now, and for the price you can get them for nowadays they're tough to beat. Get one of those and it'll serve you very well. I've heard good things about TFX's, but I've never used one so I can't say for certain.
If you weren't looking to spend more than 50 dollars, older high-end loaders such as the VLocity and Prophecy V2 (not Z2) are amazing loaders for the money. They lack a few of the convenience features of the new loaders, but they'll do the job just as well.
It would have been awesome to head down there and play that. Unfortunately, my semester started a couple weeks ago, so I don't have the free time to head down to Florida from Ohio for the weekend. My semester ends on April 30th, so I'll definitely be at Living Legends.
I've messed around with them a bit. I feel like they were never intended to shoot at people. They only break on hard targets, and even then its only up close. The splat would be too small to notice, and I bet a chop would be terrible.
Also keep in mind that airsoft guns shoot rigid BB's 100 percent of the time, I doubt they are designed to handle BB's with any sort of care.