Hi carina,
There is no good or bad nappy for you baby and being a boy shouldnt make any choice in the brand that you pick.
Being the mum of a 3 yr old boy it was very trail and error with him on nappies that worked the best and were the best value for money.
I have to confess that i used pampers on him as a newborn but once he started growing the fit werent that great on him so moved him onto tesco newborns which were great and had no accidents at all. But after trying nearly every brand of nappy going hes back in pampers now becasue their absorbancy levels can cope with the amount he pees lol.
But back to tescos nappies, I went out yesterday and bought some more tesco NB size 2 as im assuming that the b aby will be 6lb plus.But im confident that the nappies will be fine and for 47 nappies for £3.85 I think i got a bargain.
If they dont work then try another brand till you find the right ones.