D&B do a terrific job. I use them both personally and through our fund. I know a great broker there who travels frequently to kenya. Infact, he is coming next week to Nai so you could talk to him more. he is called Peter Okoed(He is kenyan!). Incase you need to meet him, i can give him your contacts and he meets you while there.
His number is +256702495095. email is pokoed@dyerandblair.com
So you can drop him one and he'll be sure to help in so many ways.

As. a non resident foreigner I will go for African Alliance rather than D & B Uganda.
Their antecedent in Kenya do not encourage non resident foreign investors.
Besides AA is a big investment house with presence in most African countries, it has been tested in both Kenya & Uganda, so it can be trusted.