you really need to define some more parameters.
Medium cost is really vague and needs to be nailed down before any recommendations can really be made.
What you're actually doing in terms of diving needs to be sorted as well.
I talked with the guys at Deep6 after the last thread that was posted about these and they said they replaced the batteries with US made packs. For that price, these are worth buying. Frankly the next light up is going to set you back close to $2k and nothing in the middle is worth it.
Accessories