Ken, I have both machines, plus a couple 2500s and a White's MXT and HH Diver and Fisher 1280x.
To specifically answer your question. The 250 is in my mind the MOST bang for the buck of ALL the machines I have. It is just plain fun to detect with. It's the one I carry in vehicles just for the convenience of having one. Others are packed when needed for a planned hunt. More fun per/$ invested in the 250 than any of the others.
Now, having said that, I would not want to be without the 1500 if I knew I was seeking deep coins, or cache hunting. The 250 (in my mind becomes marginal around eight inches of depth. There are so many additional features on the 1500 that add value it's difficult to ID them all. Imaging is the single one I would select as most valuable.
Since you say you're new, I assume you have no experience. I recommend the 250 to see if you're going to enjoy detecting. Once you're addicted, and a good deal more experienced in detecting, then I'd recommend you move up to a more robust machine (return to all those areas you hit with the 250) and become more serious about the process.
1500 = 2500 without treasure talk (a feature I turn off when I use the 2500) and no true all metal mode. (zero discrimination but not true all metal). In addition, I don't remember the manual ground balance on the 1500 though it may be there. It is definitely available on the 2500. 1500 is lighter also, which causes me to use it rather than the 2500 for many situations.
So much for my two zincs........
Have fun no matter which one you select.