The TJ07 is a very good case to watercool in, though some of the intermedry numbers I don't think were supposed to replace the 07 (isn't the tj08 a mini atx case? or something like that though I might be getting mixed up), the 11 certainly is though but I don't think it is as good. You wont find the TJ07 on the website as OCUK don't sell it though there are other places that have them. New you are looking at around the £200 mark, second hand more around £150 but second hand they are very rare.
Other possibilites though are the xspc h1 or h2 cases, xigametc elysium (spelling?) corsair 700d corsair 800d.