What jimbooo says is true but there's a great upside to all that maintainance. You foten see people getting bored of their tropical tanks and either slacking on maintainance and neglecting their fish or over-stocking and bringing disaster upon themselves. With a planted tank, things are constantly changing and needing to be looked after. It keeps you busy and, as it's never exactly the same, you don't get bored of the tank.
the same, however, is applicable to mbuna - the fish are constantly breeding, giving you plenty to do.
Having said that, I'm not one to spend all that much time caring for plants. I get easy-to-grow, hardy plants and let them grow to their xylem's content. As such, i'd be more inclined to suggest mbuna or another not-so-planted setup. I'm not saying carefuly pruned and designed planted tanks aren't beautiful - they are - I just preffer to either let my plants go wild or stick to something different altogether.
I thinks it's very difficult to make this decision without an idea of your own fishy preferences. What do you already own? I'd expect you want to try something new and different in a 60 gallon - plenty of space for all sorts. I have little doubt, however, that having seen jimboos stunning pictures, you'll be thinking along the lines of planted...
Keep in mind that going for planted, though it may mean no mbuna, doesn't mean no cichlids - think, dwarf cichlids, discus, angels, dwarf acaras, pulcher/kribs, firemouths even, severums, festivums etc Plenty of non-rift lake options.
And you can get just as much color in your average tropical community as you can with mbuna - rainbows, livebearers and gouramies demonstrate this clearly.
The downside to planted is, as mentioned, the maintainance and the fact that the fish are rarely as hardy and easy to breed and care for as mbuna cichlids.
If you still can't decide, you could always go for the choice that best suit's your tap water's pH/hardness and your budget.
