Pen testing / Vuln Assessment from Cable Modem - question on service provider selection

Wondering if anyone else has had the same challenge...

Issue - A standard nessus scan or nmap will choke my service from a standard 
home based cable modem service.

I currently use comcast, standard home-based cable modem service.  I am 
considering going the business class route, but before I pay for all the extra 
money, do any of you all have any advice?

I need to have a solid provider that is "used to dealing with pen-test like 
customer businesses"... is there someone that you all may be able to recommend 
that won't cost an arm and a leg and will meet the requirements? (i.e. one 
that's home based, allows it to happen, has pen-testing customers. and doesn't 
cost any more than 100.00 a month).

I am too far from the local telco for DSL also.

Any words of wisdom would be greatly appreciated.

Thanks,
Tommy

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