I second the Piranha Digital Peak vote.

Got a used one, and LOVE it... guy had two, and I wish I'd bought 'em BOTH. Got over a half-dozen of the old crank-dial chargers, and look to give them away whenever I see a kit with one of those HL wall packs (That or I'll drop 'em on eBay)

For $50 & shipping, the DuraTrax Pirahna Digital Peak (DTXC4005) cannot be beat for inexpensive but reliable unit for NiCd & NiMH, AD & DC, and programmable options.