right now im using a 5200k MH bulb, what color temp is closest to natural light?

Daylight has a color temperature range from about 4000K - 6500K. A typical range is from 5500k - 6000K.

1700 K Match flame
1850 K Candle flame
2700–3300 K Incandescent light bulb
3350 K Studio "CP" light
3400 K Studio lamps, photofloods, etc.
4100 K Moonlight, xenon arc lamp
5000 K Horizon daylight
5500–6000 K Typical daylight, electronic flash
6500 K Daylight, overcast
9300 K CRT screen

(Data from wikipedia / color temperature)

ok so if i wanted to get the best, most natural colors. What color temp bulb should i be looking for? 5500k?

5500K is a good color. Over 6000k and it's starting to get too blue and under 4500 it's starts to get to yellow. Most of the bulbs used in DIY projectors are between those two temps.

I've used a 4000K lamp, a 5200K lamp, and a 6500K lamp. I liked the 4000K and 6500K lamps best. Both I found were excellent, and sitting in front, I'd have placed both as equivalent, thouh the comparison photos in my PLOG show that they are in fact different, the subjective experience is the same.