I hardly think that anyone would be thinking about getting a pair of B5's with the express goal to upgrade them immediately.
The great thing about what Danny is offering here, is the option, for people on a strict budget, of getting a really good, inexpensive speaker. Then, in a short period of time down the road, for a fairly small amount of $, upgrading them, to allow the budget minded to bring their system up a couple of notches. Instead of having to sell their B5's (for probably half of what they paid), and then spending quite a bit more for their next step up.
It seems to me, to be a very good way to improve a system, at low cost, as a step between more major, and costly, upgrades.