I grabbed this set from amazon, it's on sale through may and is a pretty good deal imo:
http://smile.amazon.com/gp/product/B0035XHWNW/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1
Titanium pilot points, I have had any issues with walking and it chews through the aluminum!
I've been really pleased with this DeWalt drill index. Not saying it's the most price efficient or necessarily the best, but the bits bite straight into the wood, and practically pull themselves through. Have used on sheet metal with equally satisfactory results.
brad point bits are multipurpose. and pretty much anything that can drill metal can also drill wood.
Of course there are some bits that only drill wood but are very useful for what they do.
Good https://www.amazon.com/DEWALT-DW1369-29-Piece-Titanium-Pilot-Point/dp/B0035XHWNW/
Best https://www.amazon.com/DEWALT-DW1269-29-Piece-Cobalt-Pilot-Point/dp/B000R94EFG/