For DSTV and sport, they want 43" plasma. Samsung PS43D450 43" on special at Game for R4,999.
At their budget, entry 43" plasma provides a superior standard definition picture than entry LCD (98% of DSTV is SD) at a bigger size for less, especially if connecting to a DSTV SD decoder (DSTV over HD PVR (HDMI cable) provides a better picture than over RCA as with SD decoders).
Plasma generally also handles sport and motion better, especially at the entry level, a benefit of the technology.
It will also provide a better overall picture, if connected to HD PVR, if viewing distance is around 2m+, because entry plasma (especially Samsung 4 Series plasma vs 5 Series LCD) has superior blacks and colours (when in the right non brightly lit environment). Entry plasma is HD ready (720p), entry LCD is Full HD (1080p), HD PVR is in-between at 1080i. Entry LCD will have a "crisper" image from up close (<1.5 - 2m at 40") as it is able to display more pixels/detail from the HD PVR. I know very people who sit this close to a TV though, where a entry LCD's benefit will outweight a entry plasma's overall improved benefit.
The only down side is entry plasma is as reflective as old CRT box TVs, so doesn't suit brightly lit rooms. Curtains would probably be necessary.