[link=http://www.tech-aero.net/]Here are some nice regulators.[/link] They are made with heavy duty wires and heavy duty switches, and have the option of coming with charge jacks and stuff. They are adjustable, or you can have Ed adjust them for you.

Even if your receiver can handle higher voltages, some servos can not run at such high voltage. Ed likes to set the regulators at 6.2 volts which is fine with most JR servos, but you can have it set to 6 or 5.x if you want. Some servos are not meant to be run over 4.8 volts.

Tech-aero regulators are widely used in pattern, where guys are flying thousand dollar airframes and have thousands more wrapped up inside. These are made by very meticulous people only concerned about making the best product.

It is nice to have the switch and regulator built together as it is one less connection point you have to make, and you are assured to have high quality wires and such. Not having the proper gauge wire can lead to a loss of current running through the system which could be problematic, so you will want heavy duty wires.