mkay.... lets try searching the forum before posting questions that are easily answered.
i would say stick with the opus. It is a great power supply and will survive a crank. Also i don't think you need anymore than the 90w. I have a m10000 and a lilliput with all sorts of extras and it runs fine off the 90w
Of course you will need a fuse if its not a regulated power supply.
Run your screen off the psu i don't have any problems