The 60W RMS would appear to refer to the rated output of the head-unit, but I'd generally take that figure with a pinch of salt.
As above, anything from any of the known manufacturers would be good. I'm currently falling in love with Vibe speakers. Not to everyone's taste, but I'm finding the clarity in small cabins (MR2 then MX5) is superb.
I'd go with a set of Vibe Slick 6×9 in the rear, a set of Vibe Edge 5.25" components in the front, and if you really want to beef it up, a 12" Vibe Slick Subwoofer paired up to some kind of amp: Vibe Black Box Mono was my choice, but I've also powered my sub with a cheapo £30 2-channel one from Maplins, bridged the outputs, and heard very little noticeable difference over the Vibe one.
If you're on a budget, FLI are to Vibe what Frank Stallone is to Sylvester.