I would. 4300k is gonna be the best useable light on the road if that's your main objective. 5000k and 6000k compromise a little output for more color but will still function well. I wouldn't go over 6000k myself, I'm in the same situation as you where I drive on rural or poorly lit roads frequently and run 6000k; but they're in LS460 projectors so they've got a distinct output advantage over the same bulbs in a GS reflector.

 

running 5000K over here myself.

good chart here

 

OEM 4300-4500 for me, 5ks are waay too blue for me. I had a fair amount if HIDS

 

Don't know where you buy your 5K's but they are pure white on my HIDs. I prefer white than yellow.
6K starts to go a little blueish.

 

No. It's a 194. Just go with an LED bulb. Probably won't match since you went 8k. 6k is more ideal....