I see, well I can't influence Netgear to support PCH gear etc but you can pick my brains if you like
Buffering time and lost connections are something I have only experienced very seldomly streaming across my home network from either for my NAS units (one's my NV+, the other is a conceptronic 2 disk unit "cheapie" I got a good deal on when I bought the HDX1000).
I used to notice that starting movies took a while (initial buffering) but I solved that issue by upgrading my network spine to gigabit using a Netgear JGS524 prosafe 24 bit gigabit switch. Now movies buffer very quickly and I have no connection losses to either of the NAS units. I've even tested it with a data transfer between the NAS units whil streaming to the media tank from the NV+ and, apart from a second or two extra during the initial movie start up, there were no other issues.
Are you streaming HD ? I'm using 4.7GB .iso's as my weapon of choice for movie storage. Also are you using wired or wireless (the wireless dongles are sometimes pretty flakey ....)