Honestly, I'd use a separate veg box, much smaller of course. Trying to cram it all into one cabinet sounds good in theory and all, but the extra ventilation paths, the lightproofing probs, being scared every time you open the cabinet to work on the veg area during the flower area's night...yuck, just sounded like much extra hassle for little or no gain. Since I didn't actually go through with the all-in-one plan, maybe it's not all that bad. But I can say this: I have zero regrets keeping them separate.

The cabinet in the pic came from Lowe's. It's not really the cabinet I would have picked because of the price: it was like $280 or something, and they also had a white one of virtually the same size for about $100. But the woman liked the wood look, and it matches the decor, so we got that one. It is a nice cabinet, although I had to add a real (non-cardboard) back to it, but most of the storage cabinets/wardrobes on the market have cardboard backs.

Can't really help with nutes. I'm a keep-it-simple guy. I just use FoxFarm Ocean Forest (with some perlite and vermiculite and dolomite lime added) for soil, FoxFarm Grow Big during veg, and FoxFarm Big Bloom and Tiger Bloom during flowering. Only if the plants start showing a major deficiency (which is rare) do I go beyond that. I stop giving them nutes 2-3 weeks prior to harvest, so the taste is as clean as possible.

I germinate with those germination station deals with the humidity domes and the little spongy plugs. Those work most excellently! Not as cheap as paper towels I guess, but that Ocean Forest soil is 'hot' with nutes itself, so those germination stations give the plants time to get a decent root structure going, and the plugs buffer the soil a bit when they first go into it. That's probably why I don't have any probs using that potent of a soil even with young plants, whereas some people apparently do have probs with that soil being too rich for seedlings.

Here's a link to one of those germination stations (the exact one I use, although they're probably all very similar):

http://www.bghydro.com/BGH/Itemdesc.asp?ic=PRGS&eq=&Tp=

Then you can just buy refill packs of the plugs, and reuse the container, humidity dome and heating pad. I tried to be a cheapskate and use the paper towel method a few times too, but my germination rates went up so much with those germination stations that once I started using them, I never looked back.