The 14k #'s aren't that impressive. I'm running 175w Iwasaki 15k's now and they have more PAR than the SPS 250w 14K's. The 10k #'s look alot better, but I'm not sure on the color. Sanjays site list them at 19,337K temp with a magnetic ballast, which seems aweful blue for a 10k bulb.
Where did you order yours from? I don't understand why there is such a big price difference. MarineDepot sells them for $78.99 and ThatFishPlace sells them for $44.17, but TFP doesn't carry the 250w 10k.