If you're going to have 2 fly rods covering trout to saltwater, I suggest a 5 and 8 wt.
I'm team Orvis Clearwater for everything. When you need to advance beyond those, you will know enough to make an informed decision on your own. Other intro level product lines that I've heard good things about: Echo Base, TFO Professional II (I hear the Signature II is good as well, but I only buy 4 piece rods), and Fenwick Aetos. The Echo has a combo at a really reasonable price. The Aetos is also rated as one of the best "bang for the buck" rods around. I also bought a Maxcatch Premier for ~$65 on amazon when my Orvis was in the shop and it did just fine casting and landing fish.
@Pescado_Rojo will evangelize line quality and I echo that sentiment. A $90 line for the 8-wt will do more for you than a next level reel or rod.
Re: Kayaks. I fish out of a Lifetime Tamarack Angler. There is a new Tamarack Angler Pro that is about $350 if you can find it. It does everything you need for a beginner. I've fished out of a Tarpon 120 and loved it. With the amount of brands and models, find a shop that will let you test out multiple models and find what you like. My view is kayaks should be light and very portable; if you need a trailer, get a boat.
Additionally, I find fly fishing out of a canoe much better than out of a kayak. I love fishing out of my square stern; it's incredibly stable and I can stand and fish in it. I have a 4hp outboard so I can cover ground, get any place a kayak can, and launch without a ramp.