I can give you additional information for power supplies.
There are two types of pedals:
1. pedals that run on AC
2. pedals that run on DC
the second type is more common than the first one. AC means alternating current, and DC means direct current and they are both fundamentally different. using an adaptor suitable for AC type of pedal on DC pedal will not work, and may even damage the pedal.
The china made power supplies that you have is probably a converter of AC signal to DC signal, which is what you need. (mind you, the signal from the wall sockets is AC by default. why? it's a long explanation, but if you are interested i can tell you)
On whether you should us the 'generic' power supplies or ones that are branded and come from the pedals manufacturers depends entirely on you, but here are some of the considerations:
1. each pedal draws certain amount of current. for example, your dyna comp draws probably around 1.6mA. what you really have to check is the maximum current drawn allowable of the 'generic' power supply that you are going to use. it is normally stated in te label on top of the adaptor itself. the total current drawn must not be beyond this value when added together. if it does, it may damage your pedals, or they simply will not operate.
2. regulated/unregulated. the 'generic' power supply that you are going to use is unregulated, meaning for each pedal, there is no limitation on how much current that will go at any point of time. the thing about power supplies and electricity is that, they sometime experience current surge. while too low current will render the pedals useless (non-operational), too much current will fry your internal circuit of your pedal and damage it. of course this does not happen very often, especially in singapore (SP does its job pretty well in controlling the fluctuation of the current). but it does happen sometimes. so if you plan to use unregulated power supply, be mindful of the risk.
3. noise level. the difference in noise level between high quality power supplies and 'generic' power supplies is very stark. especially if u are using drive pedals and/or compressors. if you are a bedroom player and are able to tolerate the noise levels, go ahead. but if not, then you know what to choose.
lastly, there is a website that is full of extensive information on power supplies, but unfortunately it happens to slip my mind. it is in the forum somewhere. if any of the other guys can give the site name, it will be of great help, thanks!.
having said that, for small pedal boards like yours, i recommend a boss PSA unit. it is very quiet, reliable and relatively cheap (less than 30 dollars for 200mA maximum current). onespot is indeed very famous for its cheap price and large current capacity (1500mA if i'm not mistaken), but it is noisy.
i hope it helps.