I've recently changed my cordless gear. I had Ryobi ONE+, but burned out the angle drill and the Li-Ion batteries were starting to give up (I'd already had one changed under warranty). So I've sold most of the balance of my Ryobi gear and bought into Makita Li-ion:
This is their entry level combi:
http://www.makitauk.com/products/front/?id=1226&model=BHP453Z
on paper it has a very similar performance to the Ryobi I sold, but in reality it is much better - probably due to the much better batteries, it just keeps going where the Ryobi would have stalled. It is small and light so great for general screwdriving (especially overhead) and drilling.
I also bought one of these:
http://www.makitauk.com/products/front/?id=1226&model=BHP451Z
It's about 35mm longer than the 453 above so won't fit into tight spaces as easy, but it packs a mighty 80Nm MXT powered punch for powering big wood bits through or those tougher jobs. Less suitable for overhead use due to increased weight.
Both these combis do not have vents at the front end to allow plaster and other debris inside (like the Ryobis do, which is what killed one of those). They both have all metal gearboxes and are very quiet and smooth (a testament to great engineering IMO ).
Next I bought one of these:
http://www.makitauk.com/products/front/?id=2113&model=BHR202Z
great for those tougher drilling jobs that even the best combis find difficult (eg engineering bricks). It drills 6mm holes in brick like a knife through butter. It also uses the same batteries as the other Makita kit above. Being only 18volt it obviously can't compete with my mains Bosch SDS but fills the capability gap between the combi and the Bosch nicely with the convenience of cordless but without the expense (or "yet more batteries and charger" inconvenience) of 36volt SDSs. I haven't used it for any chiselling yet, but I dare say it will be okay for those lighter jobs like box holes in grey blocks.
I've got this SDS:
http://www.screwfix.com/prods/73560/Power-Tools/SDS-Drills/BOSCH-GBH-2-26DRE-2kg-230V-SDS-Plus-Drill
I use it for 105 and 117mm core holes regularly - usually for extractor fans. Also for chiselling.
I've also sold my Ryobi cordless grinder (just not got enough 'steam' for cutting lines in brick for making channels) and bought this to replace it:
http://www.screwfix.com/prods/67427/Power-Tools/Grinders/Bosch-GWS-7-115-4-Professional-Angle-Grinder-240V
Haven't ordered it yet, but will be getting one of these soon (currently without an angle drill having burned out the Ryobi - which btw, i got