I agree with getting some cheaper kits as oposed to paying too much money for lighting. You can have very nice tanks with low-light plants in them. I got an aquarium kit+stand (28 gallon) And i'm very pleased with it. And it's much cheaper then the brand stuff.
But i think that if you have plenty of $ it's nice to go and get high lighting and CO2
injection and such. I just wouldn't want to be pruning plants every week though......low light tanks for me.....at least for now :P