Always consider investment/return when something breaks. Sometimes, replacement is a better option, sometimes repair.
What I thought about:
This is a piece of equipment I use every day, so having a trouble free experience is important.
Will it do what I need it to? When it's working, yes. The problem being that it would cost more to repair than to buy a new, better system by quite a bit. The last time I had a problem with the machine, it was nearly a thousand dollars to fix. At the time, it was worth it. Now, I can get a far better machine for at least four hundred dollars less than the cost of repairing it.
The question of needing something fancier is almost moot in this particular case - more power was a nice idea the first time, but far pricier than the repair for the sorts of things I do. Now it is not.
Were it a newer machine, the choice would not be so clear cut.