Best XBOX 360 ISP 50 gig NON-LLU?

I am looking for a NON-LLU isp which has around 50 gig download and low pings for xbox gaming.

I mention xbox rather than just gaming as most xbox live gaming is peer to peer and not dedicated server.

This means many of my hosts will be based in the USA.

What I need is an ISP with good UK pings but also good US pings.

I was with Enta but the ALT was really bad.

I switched to IDNET for the last 3 months but while the speeds are better the pings are worse.

I have been considering ZEN. I was with them a few years ago but moved when they shuffled there pricing.

Are there any 360 gamers out there that can comment?

Mike