That just sounds like a bunch of excuses, and you seem to be coming at it from a negative perspective from the outset, almost expecting not to like it. Weird. Feedback on the i80a has been very very positive, placing it well above the mid range Naim offerings you are looking at, and none that have purchased it on here have returned it from what I have seen! I wasn't quoted anywhere near $500 shipping last time I enquired.
The i80a is certainly what I will be replacing my Supernait with when the time comes. I prefer the Supernait without PSU.
Naim is nice, but having been up and down the Naim "upgrade" path myself (and would always defend Naim here and elsewhere) I eventually came to realise its just expensive and you can get a lot better for a lot less $$. If you don't want to try Teddy Pardo's products then the Exposure 2010S mentioned by Max above is also very good value. Better than Naim.
I said $500 for RETURN shipping. I know the fees from TP's site to get the amp to me. But $500 is what it would cost to send back via FedEx, insured, etc.
If you know of more i80a reviews, I would be happy to read them