I can't compare the plywood Chris to the Engelhardts, but the hybrid model 300 Chris is in a totally different category. I played a 7/8 5-string a few years ago in a shop here and it was sweet. You really want a carved top if you can go for it. The difference is considerable.
You can see my posts in a similar thread:
Hybrid Christopher's
If there is a locally available nice hybrid Christopher for the price you mentioned, that is a safe purchase of an instrument you can touch and feel now. The all-carved basses from Bob Gollihur are very good instruments as well. I chose one of those over a Chris, but I was willing to buy site unseen after seeing and hearing a bass from the same shop. I mention this because you asked about what else might be there and after two months, I am extremely pleased with my instrument from Bob. The price with shipping is competitive with your Chris, but you will need the services of a luthier to tweak the setup to your taste. They come with good (Helicore Orch) strings and decent hardware and a way above average shop set-up.