Components in the "bread basket" of the marketplace(say up to $10K) are good for modifiers, insofar as they can be well engineered while compromised in the parts bin. Sometimes fairly simple parts upgrades can take them to a much higher level.
This is not to say that components above $10K are not compromised. It's just that in the view of most owners, modifying them is tanamount to drawing a moustache on the Mona Lisa.
This is not to say that components above $10K are not compromised. It's just that in the view of most owners, modifying them is tanamount to drawing a moustache on the Mona Lisa.