I ordered a Tripp Lite racket from Dell when I noticed a deal on it.
Craigslist often has some really nice deals also, and would be the first place I would look if you're tight on budget and potentially have room for a larger cabinet.
Hi Blake, if you have room - do plan to want one day to want to add just a little more into the cabinet... lol, trust me sometimes you just want to add another 4U into a rack..
You'll need to figure out what works best for that space. Just try to leave some extra room for additional equipment.
( for example I like to have a NAS there.. normally I use a PC case which can hold 4 HDDs )
If in the closet, you may not even need a cabinet. I used 1x3" wood to make a "rack" - or you can just get a frame to support the switch and patch panel.