I use the Hitachi DB3DL. Small, light, pistol/straight, clutch and two 3.6 Li-ion packs+charger for about $75-80.
Used to use the Dewalt DW920 but it was too big, heavy and cumbersome.
For me I actually need a power screwdriver cause of my severe Carpal Tunnel(sp?).
I only use the driver with 2.5mm, 2mm, 3/32 and 1/16 though. Using the OFNA's bits right now but want to get MIP's soon.
RACE WORLD HAWAII
Losi Type-R |Tamiya F104 PRO | Tamiya F103 | Mugen MTX-4R | AE FT GT2