[Test-Equipment] GPIB adapters?

[davec]

I want to automate a test process using a Tek scope and HP sig 
generator under NI's LabVIEW. Both are GPIB (or "HPIB") equipped.

The host will be a laptop, so no PCI card is possible. That leaves 
the options of an external GPIB controller via Ethernet or USB.

Speed isn't a concern, obviously (we're talking GPIB!), so either 
will work in this respect. I'm just wondering if there are other 
advantages of either model that I'm not thinking about.

The test equipment will be located with the laptop, so distance won't 
be an issue.

Regarding 3rd-party products (non NI controllers), I haven't found 
any that claim to be seamlessly compatible with LabVIEW. I'm no 
programmer so the "seamless" aspect is important.

Here's one USB product:
<http://www.sparkfun.com/commerce/product_info.php?products_id=549>

Any thoughts about Ethernet vs. USB would be greatly appreciated.

Thanks,
Dave