i like the deltec stuff, but man are they pricey, i also like the octopus skimmers, along with tunze (another high priced unit, but very compact), i run a tunze doc 9008 or something like that on my 225 show tank, and i have the octopus dnw 160 on my frag tanks, both skimmers do a great job.
If you are in need of alot of rock, you might try emailing them at liverockusa.com, i was able to get base rock for about $1 a pound shipped, its not live rock, but if you do a bit of both, the base rock will eventually become live rock and host all your beneficial bacteria.