Can recommend Be, as long as you have them on LLU.
Not really had to deal with tech support or anything, but reliability wise, i'd put them just behind UK Online who are very, very good indeed (but don't do 2+ AFAIK).
I'm on Be. I have their 24mb/1.3mb for £18/month 'unlimited' Package. If your interested I can send you a referral (gets you free install).