Hi d37duck,
I opened the VM6000 few months ago to upgrade the CPU. It is based on a Intel D945 mobo which accepts up to Pentium dual core, not Core 2 Duo. I did not remember the part number of others boards. Normally a VM6000 is based on the DPO7104, but this one is truly a DPO7254 with 40 GS/s on single channel. The front sticker is VM6000-1GS/s, and the rear sticker is DPO7254. There is no probe with it, but an adaptor for testing video items.
I am confident that the DPO7354 is "simply" a DPO7254 with hidden license key (or model_ID). According to the manual, even the DPO7354 supports only 2.5GHz analog bandwidth, and use DSP tweaking for achieve the 3.5GHz limit.
best.