The Centerflag hyperframe is the only one that I have a lot personal experience with shooting, and it is very good. It feels different from most purpose built electros, so I'd say try it in person to see if it fits your personal preference. Another option is to send your Mag into AGD and get them to swap it for an Emag, which several people I know have done and are very pleased with the results. It's an investment that works, because Emags sell for nearly 100% of original price; by switching out your Mag you actually make a profit by doing so, which is quite unusual in paintball gear.