The Maxel is for larger front axle systems and would require you to have a different front wheel hub. The reba is a good fork but you should also consider a Fox F series or float in a 100mm or 120mm with 32mm sanctions. Fox costs a bit more in some cases but is very light and durable. I have 3 of them on various bikes and have never had any problems. Stay away from Rockshox dart and tora models as they are more entry level models. Manitou makes a black model that is a reasonable option and is often available on clearance sales. One thing to consider is the travel of the current shock versus the new one. Longer travel will get you over the tough stuff in good order, but the increase in front end height may slow your steering response. If you ride an 80mm fork now, go no larger than 100mm, if you are @100mm, go no larger than 120. Drasticly increasing your fork length will also increase stress on the frame. Also make sure the head diameter matches the fork. Any good bike shop will steer you in the right direction, proper installation will ensure a good fit to your riding position and safety.
Absolutely true, the increase of 15 mm in travel did have an affect on the handling of my bike, but since our frames use similar geometry I can tell you that it did change the steering response. It was actually for the better. It still is very quick handling, but has a bit more stability. The great thing about the Reba, is you don't have to change it to 115 mm, you can leave it at 100 mm. The Reba also has 32 mm sanctions, it is one of the reasons that it is such durable fork.
Don't get me wrong the Fox is a kick butt fork, but dollar for dollar you will get more for your money with the Reba.
I borrowed a Manitou Black when I had my Reba rebuilt, and I can tell you that I could feel the flex in the fork. That doesn't make it a bad fork, it is just not as stout as either the Fox or the Reba.
The truth is any of these forks are good. You just need to evaluate your budget, and determine what you will be using the bike for. Good luck, and we will see you out on the trails.