I'm looking for opinions, advice, suggestions on a proposed 2.1/3.1 setup. I will not go beyond 3.1. Intended use will be for movies, games, music. I'm trying to decide on one of the following options.
Options
- L/R CMT-340 SEs + 340 SE center + sub
- L/R Sierra 1s + sub (sub purchase will have to be delayed longer)
- L/R CMT-340 SEs + sub
- L/R CBM-170 SEs + 340 SE center + sub
- L/R CBM-170 SEs + 170 SE center + sub (three 170 SEs mounted on stands vertically across front)
Setup would be powered by Denon AVR-1712
11'x11'x'8 Room Layout

X's mark proposed speaker locations
With my room layout would a center really be desired? I do watch a lot of sci-fi and action movies. I have to factor in space constraints, room size, and seating location, but would most likely go with a center if it offered improvement. I've read that given my room size and seating distance that center might make things sound worse.
Would the bass be noticeably lacking, especially in movies, with L/R Sierra 1s and no sub? There's a chance that if I got the Sierra 1s that I wouldn't buy a sub. If I did purchase would be delayed
I came across this thread in my research. Of particular interest are the comments about Ascend speakers by shadyj and cschang (posts #6, #13, #27, #45)
http://www.avsforum.com/t/1429503/starting-with-first-3-1-system-1000-1500-suggestionsEdited by p3Orion - 1/2/13 at 11:47pm