Well sure, if you have the time and the budget then go for the build, power supplies were some of the first projects I built and I still build them from time to time when I need something in particular. It is nice to have one commercially made power supply with all the bells & whistles though.
I can understand your frustration.I've been in your shoes....No really I swiped them last night.
First off .What do you want and what is your budget.You won't get fancy and cheap in the same box.
You can try a cheap Chinese special switch mode power supply, but that's a roll of the dice.You might get a good one you might not.
So I suggest Linear all the way.This at least guarantees a degree of isolation from mains high voltage because of the transformer.
Much quieter and safer for you and your projects and much easier to fix if something does go wrong.
Any of the HY3005 type linear power supplies use the same tried and true design.It doesn't matter which brand.
For a single unit they run around GBP 150+SH where as a double runs around GBP 300+SH .But with a little searching you might find one cheaper either new or used.
Good luck and cheers.
Nice shoes by the way.