Im with BT Anytime (£14.99 per month), as there are no cable companies in my area and usually connect at about 44000kb - 45300 Kb very unusual to get 33600 but disconnect and reconnect and it usually back to 44k. Download speeds are usually in the region of 8 - 12K per sec, although if busy this can drop to about 4kps.
One thing I should say is that its on its own telephone line, so this may help the quality, as there is no other interuptions to service eg people calling, switching between pc and phone etc.
Dont have many complaints about the service, never been let down but one drawback is it auto disconnects after 2hrs no matter if you are using it or not, apart from that all seems ok.
Interested to hear of others experiences.