When you say they rubbed a lot just *where* were they rubbing ? If you're talking about the tires rubbing on the radius arms there isn't a lot you're going to be able to do about that other than to maybe look into some rims with more backspacing. If they're rubbing the wheelwells the Bidi has the right idea and I'd trim the openings & run a set of flares. Now it isn't cheap (it IS cheaper than a set of Bushwacker cut-out flares) but the Eastwood company has a pretty slick tool for rolling/flaring the wheelwells and that would be my first choice.
http://www.eastwoodco.com/jump.jsp?itemID=...=140&KICKER
I'm not so sure about the spacer lifts. From what I can see they're just poly spacers that go under the coils and they sure look to me like they're awfully close to being a sort of front lift block and front blocks are way bad juju. On top of that how will the rear get lifted ? They don't even OFFER a space lift for Broncos so I assume it's only available for coil-only suspensions.
a body lift is a whole lot of work & it's include fabricating new bracketry and modifying all sorts of mounts & linkages (throttle, brake, shifter, radiator mount/fan shroud, fuel filler neck, E-brake, etc, etc, etc) There's a LOT more work that goes into a body lift beyond just slipping the spacers in and bolting the body back on.
What did your 4" kit include for the rear ? Was it blocks or a new spring pack ?
An easy way might to gain an inch would be to cut down a set of 6" coils & throw in an add-a-leaf or you might just keep the 6" coils & use a 2" add-a-leaf.
If the tires are rubbing the radius arms that's pretty much just the way it is and you have to turn less sharply & that's all there is to it. If they're hitting the body they shouldn't be hitting it by much and trimming the wheelwells will be the easiest solution. As Mongo mentioned you can also install a set of Rancho extended bump stops & those will keep the wheels from coming up far enuf to hit the body, but this *does* reduce the ammount of suspension travel you have and will effectively bring you back to pretty much the ammount of articulation you had with the stock suspension. If nothing else bumpstops are a cheap way to stop it from hitting until you figure out what you want to do long-term.