yam bat,
Probably Meridien, Novotel of the international hotels are good, but also consider the Presidential in that order. However, the Star King is also on the GRA and good value. If you want the best place for a social life (but rather noisy because of it at weekends) the Bougainvillea is cool. The large South African chain, Protea also has a good hotel on Evo Road, GRA 2. I'd be happy to stay in any of them for a few days
Forgot, the Rosie Hotel on GRA Phase 1, opposite the Polo Club, is also okay.