And now a few words about amplifiers matching. The common wisdom among Naimophiles is that you need at least a NAP 250 power amp to drive the IBLs decently. I tend to disagree. Let me remind you that even the Naim Nait wasn't completely out of question as a first partner for the IBLs. With the small Nait, the IBLs were - indeed - the first step into an all-Naim system.
My opinion is that the Nait isn't the best partner for the IBLs. Things get better with the Nait 3 or even the NAP 90.3 power amp, though.
The higher you move in the Naim power amps hierarchy, the better the IBLs will sound, that's quite obvious. For example, many Naimophiles claim the speakers sound at their best when actively driven by a four-pack of NAP 135s (!!!). Now, this may even be the case but in my opinion the "source-first" concept can't be stressed that far. The cost of 4 NAP 135s, compared to a pair of IBLs, is simply too high. I'm sure one can get better results with a passively-driven pair of SBLs, for example. As for IBLs, I think an active biamping, even with two NAP 140s or 90.3's can give excellent results.