If you want to run 33's most will recommend that you get a 1.25" bl and a 1" mml with the 2.5" lift. But look at the dpg Offroad website. The guy who owns it sets up lifts with OME shocks and springs. I bought his ultimate kit (comes with 2.5" OME lift, jks 1.25" bl and 1" mml, extended sway bar links front and rear, and jks adjustable track bars front and rear). He can tailor your lift to your jeep. I haven't installed the bl yet but it's fine for right now and I'm not sure if I will in the end anyway. I can post a picture of my jeep later if you want to see what 33's on just the OME lift looks like.
I have the exact same Jeep haha, '99 with the indestructible 4 cylinder. I don't suggest 33's with that motor without changing axles and gearing. 32's aren't as bad. I'm running a 3" economy suspension lift with 32.5x 11.5 and its a very good fit; enough flex and a comfortable ride. I ran 33's and only rubbed once. I got the full traction brand 3" economy lift, put it in myself and will vouch for it!
Welcome to the family and feel free to ask anymore questions you have, your new Jeep is a wad of clay, shape it however you see fit!
Yours may go fast, but mine will go anywhere!
I have the 2.5L as well and it's fine on power with 33's. I also have the 4.10 gears though. Here's some pics from different angles. Sorry they're all in my driveway. Haven't gotten a chance to get any offroad yet because I'm up at school and it's at home unfortunately.
Do a google search and look at other pictures of Jeeps with 2.5" lift with 31's. I had 31's on there for a little and to me it looked a little empty. But not bad. 32's would look better. But I knew if I went with 32's I would've regretted it so I went with 33's and I'm glad I did but that's just me
And if you're looking to do it right the first time (like I was), definitely call Dirk at dpg offroad, best decision I've made about my jeep so far (besides buying it of course). He definitely will hook you up with a great set up that will last a long time and won't let you down.