makita BHP-451 is a decent combi drill with plenty of power. drills 25mm holes through joist no bother and if you get some decent masonry bits and you'll be able to drill 5.5 holes through brick or solid lintels all day long. i haven't bothered getting a cordless SDS yet as i don't feel the need for one yet, i have a 240V makita SDS to use for the bigger/longer holes but i don't mind getting out an extension for those it's not that often really
so basically, if you get a powerful combi drill you can do without a cordless SDS!