From the cost point of view it's worth thinking that you'll get about 500 charge/discharge cycles from most rechargeable batteries. That makes them way more cost effective than primaries if you use them more than occasionally. I camp a lot and so I use torches a lot, so for me there's no debate about it.
Most of my rechargeables are cheap ones from Aldi ("Activ" brand). They're something like 3 quid for a pack of four no matter what the size but be aware that the 'D' size only has the same capacity as the 'C' size (3500mAh). I probably have a hundred or so of various sizes (AAA/AA/C/D), and I've never had one fail. I have a few of their chargers too. One of those failed after almost three years of service, but the manufacturer replaced it under warranty with almost no questions. They didn't even want me to send the old one back! One of the more expensive (non-Aldi) "intelligent" chargers that I have seems to have trouble starting if the cell it's trying to charge is extremely low on charge. In that case I just put the cell in another charger for a minute first, and then away it goes.