Not sure on axles... I'll let the pros answer!
I like the suspension lifts, keeps your ground clearence higher. As compared to a body lift, your frame stays where it is now leaving a higher chance of getting hung up on something.
The lightbars are all over the net, 4wd.com, jcwhittney, etc... also check ebay and craigslist. Used is your best bet, you can save a ton and sometimes even get your lights with them.
Most important, have patience with getting them. If you think your getting ripped off, wait for the next deal to come around.