Humax HDR Fox T2. Around £190-£200 for 500Gb model, around £239 for 1Tb model.
Supports recording two programmes at the same time, and watching a third channel from one of the same muxes being recorded. If both recordings are on the same mux only one tuner is used for both recordings, allowing you to watch any other Freeview or Freeview HD channel too.
Supports DLNA out of the box, allowing you to watch content from your PC via your home network. Doesn't have built in wireless, but you can purchase a Wireless bridge or use homeplugs if your PC is in another room. Humax also make a wireless dongle for use with the box which is about £30-£40. Excellent remote too. Limited catch up services.
Well respected and reliable. Custom (but unsupported) firmware is also available adding a few other tricks, such as allowing encrypted HD content to be unencrypted and copied to a PC for archiving.
Humax YouView Recorder. £250 for the 500Gb model and £299 for the 1Tb model
Very similar to the HDR Fox T2, but supports YouView on demand services. Doesn't (currently) have DLNA though.
Good reviews, easy to use. Remote a bit cheap and plasticy but works fine. Extra content available if you're a BT customer or Talk Talk customer (although TT make it a bit difficult and tend to insist the extra content is only available if they supply the box).
Advanced EPG that allows you to scroll backwards, and watch something already broadcast. Click PLAY and it will access the appropriate catch up service and play the programme if it is available automatically.
Digitalstream DHR 8205 £180 for the 500Gb model.
Based on same basic platform as the Humax. Very reliable and well respected. Doesn't support DLNA but does support same twin recording features as Humax. Supports custom add ons, but only one currently available that adds rudimentary network media sharing from the box to a PC and other devices that support Samba. Only catch up service supported is BBC Iplayer via the red button.
Cheap and plasticy remote with small buttons, but it works well enough. Excellent support despite being three years old now from MIT (UK distributor/manufacturer). New firmware due soon that adds new features, including auto/manual padding of timer recordings for example.
If you can afford it, and don't need DLNA featrues, I'd say go for the Humax Youview recorder.
If Youview doesn't appeal then either the HDR Fox T2 or the Digitalstream are excellent machines. Which one to choose comes down to your budget and whether or not you'll use the DLNA features of the Humax.