You really can't go wrong with either of those entry points.  Both have a ton of fish, scenery, nice camp sites etc...  The only real difference between the two are portages.  Sue falls requires a little more "work" to get to Cirrus but you're definately rewarded with the effort.  The Beaverhouse - Cirrus entry is a walk in the park.  My opinion and experience is that NE Cirrus - Sue Falls area is a better fishery than Western Cirrus.  I might suggest slumming around Cirrus/Quetico/Kasakokwog.  Big water but plenty of nooks and cranny's to get out of the wind.  You could spend 5 days on Cirrus and still not get a feel for the entire lake.  Same with Quetico and Kasa.