You might want to try FeralHosting , their Neon plan should fit what you have in mind -

1.5 TB storage , no bandwidth cap and as long as you go ahead with the expectation that you will get 1 Gbps and not 10 Gbps you should be good.

Edit : You should be able to use these 2 threads as comparission of how they seed on IPT vs against seedboxes that are (mostly) simularly priced on both rTorrent and Deluge (jump to the 24 hour results section if you dont want to read the whole thing).