If you are going to buy one that is rechargeable make sure you can still use it plugged in. Some models that sit in a dock to recharge become useless when the battery dies (like your ipod from 2008) because you would have to hold the dock to your face as well as the shaver to keep it powered up.
Mine is very similar to this:
The ones that BDN8 linked are dock style. They probably cut like samurai but you will be buying one every couple years, if not more often unless they have some type of battery replacement program.