T5 all the way.

A DIY inside a canopy is probably the least expensive way to run them.

If you want a fixture, I'd suggest the Aquactinics TX5 over the Tek unit. The TX5 has cooling fans built in which make for a more efficient unit. They are a bit more expensive though. The Current nova extreme pro units get good reviews too.

Or you could splurge on a ATI powermodule!

In addition to reefgeek.com, check out DIYreef.com.