Roof rack parts are all modular so you have to purchase several items to make it all work.
Yakima Q-Towers $125
Two pairs of Q102 clips at $24 / pair = $48
48" load bars $45 / pair
Set of 6 $50 or 8 $60 locks (One for each foot plus 2 or 4 extra for your attachments. Just buy the extra locks now so they'll all be the same key)
The above totals $268 or $278 depending on locks which isn't bad at all considering that the factory load bars are $250.
I'd recommend the fairing for the looks alone, but it also deflects the wind up and over the rack to prevent it from whistling/howling. It also quiets down the moonroof big time. With the moonroof open it's nearly silent up to about 55MPH. Above 55 you start to notice the wind noise and have to turn the radio up to compensate. At 80 MPH I close the moonroof. The new Thule fairing isn't compatible with the round Yakima bars (Thule bars are rectangular) but you should still be able to find the old fairing in stores. It's better anyways. The bottom edge of the old fairing rests on the top of the windshield so it can't really scratch anything. The new fairing rests on the roof and I suspect that it would mar the paint a bit.
I think the old fairing was called the 555 but don't quote me. That may be the number for the extra wide version.
It should be $45 or less because some places have it on clearance.
As far as ski/snowboard attachmants go, you could expect to pay about $100 for a carrier to accomidate 4 boards base to base or six pairs of skis. You'll also need locks for the attachments which I mentioned above.
I can't recommend a ski/snowboard carrier because I haven't worked the kinks out of mine yet. You definitely don't want the Thule 575 snowboard carrier. I had it and it sucks. It sticks up far and it's ugly plus I had to stand on the door sills to reach it and the sills get all scuffed, if you like to keep your board in a bag when it's on the roof you'll have to fight to get it in the thin groove, and you have to select one of 4 notches to hook the cable in depending on the number and size of boards you're carrying, so you're constantly standing up on the sill freezing your nads off jerking around with the freakin' cable.
I replaced it with the Thule 725 carrier and it worked great with the rectangular Thule bars, but when I got the round Yakima bars and the adapters the 725 would spin on the bars and rotate back from the wind pushing on it, no matter how much I tightened it. Next season I'm going to check out the Yakima snow carriers because they are obviously designed to work with the round Yakima bars.
So figure $450 for the setup. Oh, and both brands set the minimum prices so you can't really find a discount store on the net, although most places, retail and online will give you 10% off when you buy a whole package so I guess that would drop the price down to four bills.
Check out
http://www.racksmith.com/
These guys only sell racks so they know their stuff. They're local for me so that's where I got the Yakima stuff, plus I know them so I got hooked up. The site has lots of info and pricing.