ulysses,
The vp150 was designed for larger rooms, larger areas.
Although some ppl may have larger rooms, their listening area still falls within a confined dimension (e.g. although one's listening room is 12x25, they still only sit 12' away of the whole 25' long room).
The vp150 will have a wider soundstage due to its mere physical dimensions but either centre channel will be excellent for a system.
If you have the extra cash and the bug to buy the highest priced offering that a company has, buy the vp150, otherwise if your budget is a concern, stick to the vp100 and don't second guess your decision.
