I am looking for an entry-level home theater system and given budget constraints (~$400) I'm thinking htib. After reading many reviews and rankings I have tentatively settled on either Onkyo HTS-3300 or HTS-5300. I am going to try to get to a local brick and mortar to listen to both. In the mean time though, a somewhat dumbfounded newbie question on 7.1 vs 5.1 vs 3.1 I have a pretty small room (15x15) and given the layout will definitely not be able to use 7.1. I am only considering the 5300 because of the powered sub and what I perceive to be somewhat better speakers and receiver generally. So right off the bat 2 speakers would be spare or used elsewhere. But along the same lines - and at the risk of missing the point of these systems entirely - is it possible to use the 5300 or 3300 as a 3.1 system at least temporarily? Reason is even the two surrounds will be a little tough to accommodate in this space. I understand 7.1 system can be configured for 5.1 - but does that extend to 3.1? Will I be dropping part of the signal or will the receiver compensate? And even if it can, will I be hopelessly sacrificing a substantial piece of the pre-fab package's overall sound quality/ capability? I actually looked for a 3.1 but it seems nobody except Bose even offers such a system and not in this price range. For my budget - if I really want 3.1 - should I be thinking instead of assembling my own or are these packages still the way to go? (I'd like to do 5.1 eventually but I'm just not 100% convinced I can make it happen in this space currently.) Thanks in advance for any help!