I can personally recommend the Mulgo conversion
I had my 98 300TDI converted to a pop top by Mulgo a year ago.I couldn't be happier.
It's so easy to erect and fold down-can be done in a minute-yes it is the oztent of poptops:)-
I am a slightly built 60kg grey headed lady and find I can handle the set up/fold down with ease.The bed folds up into the roof when not reqd giving heaps of room to walk about /dress /get out of the rain etc
It has done plenty of outback /off road in the last 12 months.It is warm cosy when needed but gives great crossflow ventilation when it's hot.
The recent mouse plague on Googs track held no qualms for me but those in swags/tents had severely disturbed sleep:p
I can vouch for Daniel's quality workmanship and importantly for insurance ,registration needs engineering accreditation to satisfy regulations not only in NSW but in my home state of VIC.
He is great to deal with and will discuss any concerns queries you have before and during the conversion process,dealing patiently with my occasional exercise of "the woman's perogative to change her mind:("
Check out the Mulgo site-mine is the green Defender-and I have seen some of the latest batch too.
He will set it up inside to your specifications too.
I have mine set up with some home built quick remove modules so can become your standard Defer SW easily at any time.
Mulgo does some great set ups of a more permanent nature.
Feel free to Pm if you would like to discuss further.
I'm very happy with my conversion,
Cheers,
Mary