There are several issues that a buyer/user has to factor in and it may be different for everybody.
- First, how big does it have to be. When I had my 8x10, I had a darkroom so had no need. Now, 4x5 is as big as I go. So my needs are different that the OP.
- Second, using out in the field. I never had a need for this however, it is easy to see that if that is one of the needs, portability is high on the list.
- Third, if using only in one spot, making a semi-permanent dark box may be cheaper and better, if one is handy in the shop.
Almost any of these products have merit. The Photo-flex I have purchased, is nice, except it is PITA to set up. Might be easy for others but set it once, and did it again to photograph (will get around to selling it) was enough for me.
I found a like new or never used Harrison on epay for about $100 and its really a great product. Easy to set up or take down and store. I am really satisfied with it.
The one linked to at B&H looks similar, a bit more height room, also looks good, although the new prices of any of these is a deal breaker for me.
I probably would of purchase on of the dark boxes, like the Fuji on epay except they were did not come up that often. The weight would not have bothered me, as long as it could fold up easily and be stored.
UMMV. Different strokes for different folks.