You could probably do the section we did before just fine. We were up there about a month ago. Now that you have skid plates you could probably run all the way to Saxon Mountain that overlooks Georgetown, but I can just about guarantee you will scrape the skids.
Lefthand Canyon was about all there was close to Boulder, and it's closed due to flood damage. How far are you willing to go and what level of difficulty?
About the only other thing I can think of is around Gross Reservoir. http://www.traildamage.com/trails/index.php?id=424
Mostly scenic, except for road 68j on the north side which is not shown on Traildamage. It's more difficult with possible deep washouts and one place where you could roll on a sharp turn if you don't watch what you are doing.
Yes, StuCoils. Gave about 1" more clearance. They're linear instead of progressive, so they are firmer, but for me that's a big plus. Better off-road for going over rocks and corners better on road too.
No way could I do Blanca Peak. I wouldn't even attempt it. On trail damage a 5 - 6 is pushing the limits of my stock Jeep. With a lift and at least 33s I'd be willing to try it with the right group, but I would expect body damage.
The wrangler didn't have abs until the jk, 2008. From what I hear from jk owners the abs and traction control systems make lifting the vehicles more complicated and expensive. Off road I've never been in a situation where i wish I had either, would be nice on the road though.