Sport Block 5.0 by Power Block
The Sport 5.0 equals/replaces 10 pairs of dumbbells or 550 lbs of free weights.
The weight range for the 5.0 is 5-50 lbs per hand in 5 lb increments.
Weight increments achieved are; 5, 10, 15, 20, 25, 30, 35, 40, 45 and 50 lbs per hand.
The 5.0 can be further expanded to 65 lbs per hand with the optional Sport 5.0 Set 20 lb cores.
Sport 5.0 is an incredible value at $299/set. This set replaces 550 #'s of individual dumbells.
Posted by Hector on 27th Jul 2009
after searching some other brands of adjustable DB's such as way expensive titan brand and bulky ironmaster I decided to go after powerblocks, with no regret I can tell you that at 299 plus tax, they are a much better choice than the above, they feel pretty sturdy, no need to have a dedicated stand, since they can easily be adjusted while laying on the floor, they have the look and feel of a pro gym dumbbell, not cheap looking as selectechs.
You can choose to have some plates with you, let's say up to 30 lbs, and leave the rest aside, then use 30 lbs to go below.
If you can find a local dealer you can save some bucks on shipping. in SD area fitness mart will be a good deal.