Well, I wound up getting the Ryobi Tek 4 for my birthday the other day:
Details on it here: http://www.ryobitools.com/power-tool...ts/details/375
The initial test was very good. I used it with an Evans bit. It's a light unit. Reversible. It has 2 speeds, 200/600 RPM. It comes with a carry bag, charger and a set of 6 screwdriver bits (3 straight, 3 phillips). It has a quick release chuck (push/pull to insert and extract) and should fit any standard 1/4" hex shaft bit. It also has an LED work light underneath that illuminates the work area.
The low speed worked smoothly and effectively. It has a 20-something position torque limit. I found that the lowest setting gave me something a smidge tighter than finger tight.
Hopefully I will remember to give another appraisal after I've had it for a while. Right now, though, it looks pretty good for the intended purpose.