The C and D cell Maglites are still pretty useful for household/vehicle flashlight use as the alternatives are still quite expensive. I recently acquired a 3C Maglite after finding some long forgotten (10-15 years old) NiCads C cells (now basically unavailable in the UK for retail due to environmental issues). The C abnd D cell Maglites are pretty heavy duty, rugged and reliable once the incandescent bulb is replaced with a good quality LED bulb such as TTS-3WP (@150 Lumens)
http://www.thetorchsite.co.uk/TTS_3_watt_LED_upgrade.htmlI have even found a supplier for some low cost LSD NiMh C and D cells, about 1/3 the price of Eneloops so a 3D or 4D Maglite might be worthwhile getting as well.
A 4D Maglite with 10,000 mAhr LSD NiMh cells would give approx run time of around 16 hours runtime at 150 Lumen.
Also if you need to charge cells say just before a storm strikes (with consequent rolling power outages) then using a charger such as the Maha C808M 8-Cell Professional Battery Charger will allow you to charge the equivalent of 40 Eneloop AAs using 8 D cells for some cost effective D cell Maglites in around 5 hours.