What are the best adjustable dumbbells on the market?

i had the 10-90lbs bowflex and they been falling appart…. first i start loosing the big 20 lbs disk and then the some other problem happen and i could not change weight anymore on one side. All cost me around 700$ and lasted 2 years and 3 month
i ordered skott dialtek 10 to 65 lbs from www.skott.ca last christmas and so far happy with those.
skott dialtek are noisier than bowflex but the grip is much more comfortable and they seems to be more reliable due to less plastic use
stand was included too and it relly helps ( looks great too )
i suggest skott dumbbells compare to other brands but i never used the powerblocks
Richard