What I'm after is something slightly more compact (and thus probably lighter as well) but otherwise basically about the same. Thus 10.8 volt or 12 volt LiIon would seem to be about where I'm aiming.
I can't afford to buy new Metabo, they're out of my price range now (I bought the ones above at clearance prices) so I'm probably looking at sort of 'middle of the range' good DIY or cheaper end professional tools.
I *definitely* want automatic spindle lock like the Metabos have, other than that and being light and compact I don't really have any major requirements.
What I have looked at (on-line) so far are:-
Erbauer ERP407DDH 10.8V - Screwfix own brand, seems to fulfil my requirements, anyone have any experience of this?
Ryobi 12v from B&Q http://www.diy.com/nav/fix/power-tools/drills-drivers/-brand-Ryobi/Ryobi-12V-Drill-Driver-with-1-x-1-3Ah-Lithium-ion-Battery-in-Bag-13168689 Similar price (when bought with two batteries)
Any other suggestions at around the same sort of price range, I can stretch it a bit if necessary.