[BiggarView]

I guess it depends on whether you are going to full time in your rig. If so, this is your home... the IS will be a dramatic improvement in the ride. As for the disc brakes, stopping performance is far superior with disc brakes. Having said that, if you do not plan on living in the trailer or you only move is once every six months, it is harder to justify the cost of the upgrade. Your situation dictates whether it is a worthwhile upgrade.

What comes with your trailer is rigid axles on leaf springs with drum brakes. The Mor/ryde IS is each wheel independently sprung on coils and if you want... disc brakes. Many people also upgrade from 7000 to 8000 lb suspension or from 6000 to 7000 lb suspension... a choice. There is case for it and against it. FOR it... Full timers tend to overload their trailers, the extra suspension capacity can handle the extra weight, Against it... added expense.

My study of run of the mill 5ers is the shorter the rig for a given frame strength, the less of the need to upgrade axle capacity, the longer the trailer the greater the need...but that is for those that full time in their rigs. Weekend warriors typically do not load everything and the kitchen sink into their rigs. If you boondock and Full time, you may also consider solar as a viable option... that will add from 500-1000 lbs to your load out depending on the size of your solar set up. Will one's suspension handle it? Upgrading is a serious consideration.

We will be moving in our "home on wheels" fairly frequently so ride improvement and stopping performance are must haves for us. We will also be adding a fairly large solar set up so the upgrade suspension capacity is really important too. Everybody is different. YMMV as they say.