Well at around that price, unless you’re getting a brilliant deal on something from last year, I’d always stick to the big 4, canyon, ribble, planet x, boardman. You just get a much better bike for the money, IMO.
I don’t have much experience of SRAM, so in typical STW fashion, I’m not a fan (fear of the unknown). I’m a Shimano man, so can’t offer much advice on the different SRAM groupsets, but I reckon you could still get a reasonable bike for £700ish with a SRAM groupset that works well.
Got any idea about what size you’re after either? Or have you thought about going 2nd hand? I’ve seen quite a few bargains on the FS section on road bikes.
Also, as you’re on a budget and not really bothered, try to stick to aluminium, you’ll save yourself a wad, and a decent aluminium frame will quite often be better then a lower end carbon one.