My 98 is my daily driver and I am running the RE4.5 with a SYE and I get a little bit of vibes but only when going over 70mph. If it is your daily driver, I would say plan to take it out of commission for at least 1 day longer than you expect it to take to do the lift, because without a doubt, you will always run into something unexpected. I did my lift and tires from 6pm to 6am in one night, and was very fortunate that the shop I work at has a full room of misc hardware and that I am well set up with tools because of course things didnt go perfectly smooth and I ran into a couple snags that were easily fixed, but preparedness is the key to lifting it, always plan for the unexpected. Aside from that, after the alignment, which you WILL need, my DD now drives me 50+ miles a day and works fine. When I say it works fine doesnt mean it drives like stock, yeah it sqeaks a bit here and there, and I get a little bit more of a rumble in 4H than I used to at stock hight, but it is all manageable it all is just a matter of what you are willing to put up with, its the same way with tires, guys like Tozovr can deal with running Bias Ply swampers on thier DD while some other people can't stand anything but BFG At's on the road.
As for the trac-bar the RE hd trackbar is a huge improvement, not only because it will center your axle but it gives you a whole new bracket that is much stronger and heavy duty than your stock one, a 3inch lift and 31's with no adjustable track bar your axle will no longer be centered and you will probably have 1 tire that will rub while making sharp turns. I run the 31's TRxus and can still get them to rub with 4.5 of lift at full flex or during a really tight turn.