Well after much deliberation I went with a Reimo easyfit for my LWB.
Yes I guess a little 'boring' you may say as it's plainly obvious it's got a chunk of fibreglass bolted on the top. What that means though is no leaks, plenty of headroom, a quality, nicely finished product that will add value to your van.
Being a LWB your options are more limited than with a swb (ie. SCA don't do a 194 equivalent for it, no v-tec in the Reimo etc).
I went for the comfort (sprung) roof bed option, don't think can get anything like that in a Hi-Lo?
Also went easyfit rather than the classic/superflat (or whatever it's called) as it looks a lot neater (especially where the roof meets the front spoiler) inside and out.
Only thing I don't like are the visible fastener on the exterior of the roof.
I guess it boils down to how important the looks are and if you're willing to gamble with possible issues and the complexity of fitting a roof like that.
I'm sure there's loads of hi-lo's without any issues but you don't hear of many Reimo roofs leaking and big installation problems?
There's plenty of T4's driving about with 20ish year old Reimo roofs that are still working - that says it all for me.