My 2 cents:
If you want to spend the money and get the most light out of a fixture you can get, then go with the Teks.
If you want the most bang for your buck, then get the Catalinas.
Catalina does sell a hanging bracket to go with their fixtures. I've got mine on legs, but I know there's someone else on here who hung theirs... I was thinking it was you, Naja?
I love mine, and me being my own thrifty self, I don't ever think I'll own a Tek unless I come across a deal I just can't pass up next time I'm in the market for a fixture. I'm really happy with my Solar.
(One of these days I'll upgrade to Geisemann bulbs, but for now I'm running some a Hagen PowerGlo and the Catalina bulbs it came with. They are pretty high on the blue spectrum, so you probably should mix in some lower kelvins if you keep the 10k. I even kept in one of the actinics b/c it really makes my Cardinal tetras GLOW
)