I have a 29er HT Specialized Stumpjumper. I want to get a Dual suspension bike for SoCal all around. Should I stick to 29er or move to 27.5 plus
Yes... 27.5 + can be a little more plush, but they are finicky on tire pressure, and a little too much or too little air makes the bike bouncy or squirmy respectively. 29ers are probably faster and more precise. Bottom line - whatever floats your boat is the right bike. I know guys who tear up the trails around here on singlespeed 29er hard tails, and guys who grin ear to ear on their Hightowers or Switchblades. Just ride!
I prefer both. 29er for my longer rides and 27.5+ for the chunky stuff. Fortunately for me my bike can be set up either way.