cis + avast as av?

Hi, will cis (fw & d+) work well with avast free AV ?

From the reviews/tests i read, avast should be better in terms of speed & dedection. I normally dont really care about the AV’s (HIPS is the AV of 2011 :P) I found the build in solution from CIS fine… as it propably works faster/better than using some other AV.