This is the one I use:
http://www.hobbyking.com/hobbyking/store/__63446__Turnigy_E3_Compact_2S_3S_Lipo_Charger_100_240v_US_Plug_US_Warehouse_.html
It's slow, and not fancy, but for the price I really don't care. The main reason I bought this one is it's all self contained and doesn't require an external power supply like many of them do. For my applications I would rather just have a couple spare batteries on hand than try to keep up by fast charging. YMMV...
While the battery is hooked up to the radio I use a low voltage alarm to ensure I don't over-discharge the battery. Here's what I use:
http://www.hobbyking.com/hobbyking/store/__34120__Hobbyking_2_8S_Cell_Checker_with_Low_Voltage_Alarm_US_Warehouse_.html
It weighs next to nothing and is very small. The internal piezo alarm is super loud so I popped open the case and ripped out the diaphragm. You can still hear the alarm but it's much, much quieter.
BTW, there are less expensive LiPo's available that come without the hard case, but I typically have my radio gear thrown in my backpack and just like the extra insurance of the hard case. If you're just going to your local park and not handling the batteries rough, the regular packaging would probably be just fine.
I also cut off the bullet connectors and put on Anderson PowerPoles, as all my radio gear is wired for those.
Here's one of the less expensive battiers for example ($22):
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=8587