Hi Pooch
We got our customline in Feb of this year and are very happy with it. From your shortlist, my shortlist also had Jimboomba on it. My advice is to study the specs, decide whats important to you then go and have a good long look at each. I went to the Brissie pre xmas camping show and once I had narrowed it down spent a few hours going back and forth between the three I had narrowed it down to. This was great as you can do comparisons, then when you see something else you want to compare its easy to go back and look at the others.
For me it came down to a compromise between tent and trailer. I rated customline canvas and tent features such as tropical roof design, door location, annex/pole design above the others I looked at but the others had fancier trailers. For me I decided that I was going to use the tent every time I used the trailer, where I wasn't going to thrash the trailer over the roughest track every time, so tent quality and features took a higher priority. The customline trailer is still very sturdy but as I said not as fancy as a jimboomba or lifestyle (the others on my short list)
Its not an easy decision though.