Get the Benq, hands down. In fact avoid the Acer at all costs.
Why?
I had one of these a while back. It had a weird problem, where it had an odd fringe around high contrast pixels, making text look oddly blurry and is immediately noticeable and very annoying. It looked even worse on the digital input too, surprisingly.
It couldn't be adjusted out and is a design fault. I took it back to the shop and saw that their demo model was the same. Novatech were excellent and gave me a refund, no quibbles.
Also, I'd avoid buying from Overclockers unless you really have to. They do outright scams/frauds. For example, when selling certain end of line items, where they sell it as OEM new, when it's actually used. This happened to me recently with a quad core OEM CPU, so I forced them to give me all my money back. Bastards.
I made a thread about it on TPU if you wish to search.
Good retailers to buy from are:
www.novatech.com Consistently excellent customer service and are my preferred supplier
www.aria.co.uk
www.amazon.co.uk Always look for stuff there and see what price it's at. Avoid purchases from their marketplace sellers though, as the ratings don't mean Jack Schitt and I've had some recent bad experiences with them. Why the ratings? I never received my item from one of their sellers (carmsbarginstore) and then received bad customer services when I emailed them about it, so I left bad feedback. Amazon pulled it because "it was affecting their performance" and didn't even bother notifying me. Can you believe that!
Yes, poor ratings made their sales go down, as they should do, so they collude with the seller to lie about the true ratings. :shadedshu I tried to get it reinstated, but just got the runaround from Amazon. Shit customer service from them in this instance, so their seller ratings are BS. Buying from Amazon themselves is a completely different experience though and you'll get excellent customer service there.
Ok-ish are
www.scan.co.uk The problem with them is that the items you receive show significant box damage, like they've been kicked all round the warehouse. :shadedshu I've also heard some horror stories about their customer service, although they weren't bad with me.
www.cconline.com Never used them, but they're supposed to be good.
Avoid:
Overclockers
Dabs
Microdirect (Nearly went bust a couple of months ago and have ropey customer service)
Oh yeah, I've got the 3D Vision glasses and 3D gaming kicks ass.
Hope this helps.