MegaFarm Drip System big plant?

Hello, i have a 8x4 grow tent with 2100 watts hps/hH with some side cfl lighting im looking to just grow one or 2 very large plants i came across this,.

http://discount-hydro.com/productdisp.php?pid=426&navid=4

good ideal or bad?

dude at $299 you could DIY your own for under 100 bucks

you can grow big plants in the waterfarm which is on $60