It’s no secret there has been some very big success in the Pocket/Micro tool market. It started with the Bosch 10.8v tools, then the Milwaukee 12v (newly named the M12 tools) and now almost every tools company has some form of these compact lithium ion tools. One of the common complaints for most of these tools is that they don’t have a standard chuck but instead a ¼” hex. This means you can’t use standard drill bits for pilots or any other form of drilling and if you need to carry two tools around that pretty much defeats the purpose. Obviously if you are going to do some serious drilling you may want to look at a slightly larger tool. Perhaps something like the new Milwaukee compact 18V Lithium 2601-22 ($199), still lightweight just over 3.5 lbs but it is built for heavy use. That being said you should still be able to do some occasional drilling and detail work with the 10.8v and 12v tool.
The internet is an amazing place to shop, compare and learn about products but I do feel there is something that maybe hasn’t been completely figured out when it comes to recommendations and accessories the way you get when you come into a store, hold the tools and talk to the guys behind the counter. A great instance of this is with the Milwaukee 38 Piece Quik-Lok 48-32-1500 set which sells incredibly well with any brand of the Micro & Pocket Drivers in the store because it just makes sense. The kit comes with 7 different sized ¼” hex drill bits, ¼” & 3/8” square socket adapters, Quik-Loc connectors and all sorts of different size driver bits. This is way more than just another driver bits which you already have but some however that gets lost online. With so much “upselling” going on it’s really hard to tell if this is really a recommendation from someone who know what they are talking about or simple a computer program matching compatible accessories, trying to add a few extra bucks on the sale.