will an xa lay the frame rails with easy street struts up front and some convoluted bags with bag brackets for the rear?

Nope. The xA setup is essentially the same as the xB setup. With it fully deflated you will be close to the ground but not on the ground. When I fully air out my xB (easy street front and rear installed per the manual) the closest point to the ground with a stock lip is 1 1/2 inchs or so. The underbody (frame really doesnt apply here) is mostly 3 or more inches off the ground. Further modification to the car and suspension is necessary to lay the underbody on the ground. A guy in our club "Bagnasty"has an xA that lays underbody. He did extensive modifications to attain this attitude. Check out his profile http://www.scionlife.com/profile/BagNasty .

oh :( thanks, I really like that one.

if u remove the sway bar, would the front lay on 17's?

No

do you know what other kind of work would need to be done for the front atleast?

If the strut mounting was moved up in the car a couple inches and the sway bar removed you might get there. That would involve cutting out the strut towers and welding them back in higher up in the car. A taller front front bumper assembly can give the appearance of being lower. The lip on my xB just barely touches the ground when I am aired out. It is about 1.75 inches taller than the stock lip, so it starts out 1.75 inches closer to the ground.