Currently have Def\/Tech 6.5 LCRs as left and right and center. Thinking about adding front height speakers. Can easily add def\/tech 3.5r, or 4.5r. Would like to use the 3.5s because I feel that it would get lost and visually I'm not a huge fan of 5 fairly large speakers in the wall. Is that going to pair up well with my L\/R speakers? Or so I need to use the 6.5s to match better? OR, do I just forget about the heights all in all?