Which one of these used stoves would be best?

Hi all, with your help I was able to install a stainless liner/block off plate and install an older smoke dragon insert. It sure heats well, but it is not efficient and needs to be constantly monitored. I have only had it installed about a month and I am already looking for a newer EPA replacement. Money is tight and I'm trying to use as little oil as possible. I would like a decent stove that will burn overnight. Our house is a single floor pretty open 1000sq ft ranch. If possible I would like to mount the stove in the fireplace like an insert but I don't mind not having a surround. It is a real masonry fireplace built in the 50's with now a stainless 6" insulated liner. Here are some stoves I found on craigslist. The first is a lopi answer I left two messages but have not heard back
http://newyork.craigslist.org/fct/for/4232839196.html
the next one(olsberg) I could not find any info on but it does look nice- I don't know if it's EPA or has secondary burn?
http://nwct.craigslist.org/hsh/4176769444.html
the third is brand new and I'm sure it can be had cheaper than asking price. It looks like overstock and there are pallets of them. Any info?
http://newhaven.craigslist.org/for/4213174156.html
thanks - Jeremy

I will send another message about the lopi. Is the olesberg an EPA stove? Is it catalytic or does it have secondary combustion? It is much nicer looking which would please the wife. The third one says El fuego waterbury ct on the crate, so I don't think it foreign. It looks like the company was bought out and these might be old stock. But I have No idea how old Thanks for the info so far. I appreciate it.

Well the lopi ad has been taken down so I guess it's gone.

I talked to the guy about the olsberg. I might go check it out. He is supposed to send more pictures. It's odd I can't find any pictures or even the manual online. It is a nice looking stove.