In Lome, the best place to stay is the Hotel Sarakawa, which is basically equivalent to a european 4-star hotel and the best hotel I have been to in West Africa. 15 minutes from the airport, and crew rates available (we paid 75 USD).
Tel : (+228)2276590
Fax : (+228)2277180
In Cotonou, try the Sheraton next to the airport.
In Ouaga, they have the Silmande Palace, which is once again good quality and where airline crews go.
Tel
+226)356005
Fax
+226)356054
In Abidjan, the best place is the Sofitel in the Plateau district. It is closer to the airport than the Ivoire, and the interior is much newer. Same prices however, and crew rates probably available.
Tel
+225)20/221122
Fax
+225)20/212028
Good luck.