I'll add my new standard-issue comment: The Digital Miner is better![insert trajing standard-issue "Boring Machines are better" comment here]
As for the import buses: they are slow compared to Logistics Pipes Mk3 extractors. If all you want is to get your stuff into the ME network for later processing, the fastest way to do this I can think of is to use Mk3 Extractors (as many as you need) on the entry chest and send them into an ME interface via Logistics Pipes default route in the pipe immediately next to it. That should avoid speed issues.