For the front light, I would recommend
Serfas SL 1000 It is very bright, and the mount is good, as for disadvantages - it flashes too slow, like one second on, one off, IMHO there should be a rapid flash mode which would be far more efficient.
Cateye EL-400 is another little small, very bright light. The battery time is great, more than the claimed 120 hours on one battery set, the flash mode is all-right, the mount is a crap, but can be fixed with duct tape/old cateye mound/etc
IMHO, the best rear light is
Cateye LD-1000 - it has good side visibility, unlike most other LED taillights. Of course, you can buy an additional
Lightman Strobe if you think you'll ride in a VERY dense traffic. Otherwise, LD-1000 is enough.
Of course, don't buy anything from REI, eBay is the answer