Do it right the first time. Spacers will give you a rougher ride up front. Get aftermarket coilovers like Donahoe or Sway-A-Way.
I wouldn't say that getting Sway-A-Way is "doing it right". You might say that back in about 2001, but not now. Most other adjustable coil-overs on the market have a better design now since they are more easily maintainable. Also refer to this post from a while back for other adjustable coil-over possibilities:
www.4x4wire.com/forums/showflat.php?Cat=&Board=UBB13&Number=539806Donahoes are said to be one of the "choice" ones now.
I'm curious as to how it will give a rougher ride. It seems like it would still have the same spring rate and travel resulting in the same quality of ride?
That's what I used to think too until I experienced the difference myself simply by cranking up adjustable coilovers. It has to do with the geometry of the control arms. It doesn't matter that the spring rate stays the same. The steeper the angle, the harsher the ride. Just for an example at the other extreme, if you use adjustable coilovers set way too low so the arms are almost horizontal, the ride is WAY too soft and squishy due to the geometry. But I know that's only part of the story since other coil-overs ride better than adding a spacer to springs for the lift.
I don't entirely understand why adding a spacer makes it a harsher ride, but if you compare rides in different people's trucks that have different lift types, it definitely makes a difference. The shocks likely affect it a lot. Like others have said, the spacer lift in front doesn't feel as good as other types.
A separate problem is that many coil-overs now have unnecessarily stiff spring rates (like 675ppi). That's not good if you don't have lots of added weight from other mods. I'm glad mine are no more than 600, despite all the added weight of mods. So there's something to be said for keeping it simple with other Toyota springs for a conservative lift if you plan to keep the weight down or do slow rock crawling, etc.