Sam Knows says he's about 1.8km crow-flies distance from the exchange. Sam Knows suggests he can get c.5Mbps which would almost certainly be ample for his needs. I've no idea what hew currently gets but it's clearly satisfactory.
Anyway - any particular things to watch out for or avoid for a wireless router. FWIW I use a Netgear DG834GT and it seems pretty solid. What's the current Netgear equivalent?
Although a WAP would presumably work it seems they're as expensive as a new router.