Hmm seems that "Bosch GSB 1600 RE" doesn't have hammer action..
You shouldn't need much for most brick. I would suggest something light <=2Kg class.
850W would probably be too much - my Bosch 850W SDS (3.2J) can blow the back out of bricks if they're weak and drilling house bricks is matter of about 5 seconds to go through it.. so anything around 700-750W (~1.6J hammer action) would work and be suitable for 99% of the DIY tasks. Having a SDS helps brickwork and longer drills that can snag but normal chucks work for most drilling with hammer action.
Don't worry too much about max RPM, the bigger bits need slower RPM anyway. Mine does 950RPM max for example which is more than enough for coring and drilling brick.
I've cored 100cm and drilled the full length of a 46cmx18mm drill bit through hard concrete I will say the feature you MUST have is a safety clutch incase the drill snags - a reverse is also good if you hit something.
Pretty much any of the Bosch blue SDS-plus range around 700W in the 2Kg class will last you for any task. You could go for the hammer drill (non-SDS) but you may find it's harder for the tasks you want the power for. You can get swap out chucks but also adaptors. The only thing is the hammer drills tend to be less bulky.
