I liked the Sanyos/Panasonics last year. Can fit the N series where not much else will fit. We did a lot of them untill we became Sunpower Partners.
I like the sunpower technology more, no visible wiring etc, if you're willing to pay for the best, get the best, they are very similarly priced. The Sanyo N series look just the same as a conventional panel, the Sunpower are unique.
That said they were both good value last year in the right circumstances, even at nearly twice the price as they currently are. This year it's a struggle to view them as value where they're priced. Last year it was worth paying a bit extra for another 800Wp, this year its marginal.
We recently had a customer come to us asking secifically for a Sanyo quote which we delivered as requested. He went for a ZNshine system with an inverter i've never heard of by a competitor of ours... Last year the brand had some clout, its a lot easier to convince someone not to go for Sanyo this year it seems...
I think you've done well...