Are you planning on jumping right into All Grain brewing, or do you plan to do a bunch of extract and partial mash brews first?
And even if you are planning on doing extract, do you want to get into all grain right away?
I'm asking because, honestly, this kit seems up there in price, mainly because they include a lot of stuff you may not need when first starting out. I got my starter kit for $60, but it doesn't have a wort chiller, glass carboy, wine thief, and a couple other little things. But then, I don't *need* that stuff yet.
I started with the cheaper kit because I wasn't sure if I'd want to keep brewing. If you *know* you're going to keep doing this and you *know* you want to go all grain soon, then this looks like a great kit.
The pot size again has a lot to do with if you're going to eventually go all grain. Assuming you are, the absolute smallest you'd want is 7.5 gallons, but most recommend something larger, up to 10 gallons, for enough head space for possible biol overs.
But then, if you're doing extract kits with partial boils, you only need something up to 5 gallons for that.
Hope this helps.