All the Odyssea stuff is ,for lack of a better word, crap. Aquatraders doesnt warrenty there products, their costomer service is terrible, and the quality is very bad. I can understand getting a small inexpensive PC fixture from them but i have heard so many stories of there products just breaking (or arrived broken and took months to replace) and even one where the ballast one of the halides just plain caught on fire.
Coralife is better but is still not steller. Most of the hoods seem kind of cheap and flimsy to me but thats just my opinion. Aquamedic, sunlight supply, geisseman (sp?), ice cap, or hamilton all produce much higher quality products. Of coarse though, you get what you pay for.
Oh and T-5 HO (high output) are much stronger/better than PCs. T-5 is just the size of flourescent bulb but HO the good part. T-5s though are very dependent on having a good reflector. In order to get the most out of T-5s, you need to have good parabolic reflectors. A good reflector can increase the PAR rating by 50% which is very significant.